Promethium Line · Bombed Refinery Tower Turned Drill Rig with Removable Mast · 28–32 mm Grimdark Wargaming Terrain

### The bombed twin, back at work

F-06 is the bombed twin of refinery tower E. A shell tore the tower front open and blew its top off, and the right half of the gallery crashed down onto a column stump. The crew capped the stump with a rig floor and stood a yellow lattice derrick on it: a top drive turns the drill string straight down through the tower into the ground. The blast breach shows the borehole in cut-away, with strata, casing, a wellhead with red valves and the bit at the glowing bottom of the hole.

### Features

- Same square 292.1 × 292.1 mm (11.5″) footprint and tower design as refinery tower E, terrain area 853.22 cm²
- Landing at 76.2 mm = 3″ and a remaining L-shaped gallery at 152.4 mm = 6″
- Checked: 5 × 40 mm bases on the gallery without overhang (211.63 cm² usable), one 40 mm base on the landing
- Removable lattice mast, 180 mm tall (279.7 mm above the table), held by 4 + 4 magnets so it lifts off for transport
- Cut-open borehole, shell crater, collapsed gallery slab on a column stump, hanging pipes, exposed I-beams, rubble heap, torn-off parapet
- Driller's control pulpit with cables and a rack of spare drill pipes in the yard
- 24 mm armoured parapets with vision slits mixed with open railings. Ladders 51.2 mm clear, 8 mm rung pitch.
- Torn inlet with a surviving shut-off valve, system flange Ø 44 mm at 89.2 mm

### Game use

Rules for Warhammer 40,000, 11th edition. Unofficial fan-made terrain. Not affiliated with or endorsed by Games Workshop. Warhammer 40,000 is a trademark of Games Workshop Ltd.

- Category: Dense, as a ruin (suggested, agree before the game).
- Levels: 3″ platform, 6″ remaining gallery. The mast, rig floor, borehole, collapsed gallery slab, crater and rubble are not levels.
- Objective piece: no.
- Terrain action: none. F has no switch, marker or extra effect.
- Set-wide frame: each player can start 1 terrain action per battle round, across the modules that have one (A, B, D, E, G).

### Print settings

- PETG, 0.4 mm nozzle, 0.2 mm layers (first layer 0.2 mm)
- 3 perimeters, 4 bottom / 5 top layers, 15 % gyroid, 240 °C nozzle / 80 °C bed
- No supports, no brim. Every part fits a 220 × 220 mm bed and is already in print orientation.
- The lattice mast is the most delicate part. Deburr the thin fracture edges carefully.
- 61 printed parts on 7 plates (01–07), plus the flange coupon (plate T)

Print time and filament (PrusaSlicer 2.9.6 estimate, heat-up not included):

- T · Flange coupon, print first: 0 h 28 min · 4 g
- 01 · Back gallery, 2 mast side panels, 3 columns, 2 railings, pipe rack: 18 h 30 min · 208 g
- 02 · Left gallery, mast front and back panels, mast frame, top drive, torn parapet: 7 h 39 min · 89 g
- 03 · Base plate with crater, collapsed slab, trestle, control pulpit, hose, hanging pipe: 9 h 17 min · 115 g
- 04 · Base plate, upper ladder, drill string, crown block, column stump, beams, valve wheel, torn pipe ends: 9 h 18 min · 113 g
- 05 · Base plate, lower ladder, rig floor, rubble heap, beams, name plate, pipe stand, hanging pipe: 10 h 26 min · 125 g
- 06 · Base plate, pipe trestle, gallery key, landing, torn inlet: 8 h 59 min · 117 g
- 07 · Tower stump with cut-open borehole, landing brackets: 6 h 48 min · 83 g
- Total terrain: 70 h 57 min · 850 g (with coupon: 71 h 25 min · 854 g)

### What else you need

- 10 magnets, 5 × 2 mm discs: 2 for the pipe flange, 4 in the mast frame, 4 in the rig floor (plus 4 if you fit them in the coupon)
- PETG-compatible glue. Everything except the mast unit is glued permanently.

### Assembly highlights

- Print the coupon first and check the system pin and magnet fit on your own PETG.
- The four base plate quarters join with keys underneath. The tower stump goes in the centre with the breach to the front, and the drill string stands on the borehole floor.
- Glue all four rig floor magnets with the same pole up and all four mast frame magnets with the opposite pole down. The mast then sits and holds in any orientation.
- The mast unit (frame, four lattice panels, crown, top drive, pipe stand, rotary hose) is glued into one piece and locates on two studs on the rig floor.
- Flange magnet polarity, the same on every flange of the set: look at the flange face with the notch at the top. Left magnet north pole out, right magnet south pole out.
- Step-by-step instructions with all parts and positions are in BUILD_GUIDE_F.pdf.

### Works with the rest of the set

Promethium Line is a coherent terrain set in ten modules with one story. The mountain is the promethium source, drill station D taps it, and the pipeline H carries it past pipe bridge A and buffer tank B to the refinery with tower E and the bombed tower turned drill rig F. Loading yard G closes the chain. Craters K, the tanker wreck C and field defences J show the fight for it.

Every pipe flange in the set fits every other flange: Ø 44 mm, a square system pin and two 5 × 2 mm magnets. F sits on the 89.2 mm high line with A, B, D and E. Next to tower E it shows the same refinery before and after the shelling, and on a big table two or three drill rigs spread large cover across the field. See the Promethium Line collection for all modules.

### Files

- Model files: all single STLs in print orientation, plus one PrusaSlicer 3MF project per print plate, named job_<plate>_….3mf (T, 01–07). There is no G-code. Slice the 3MF projects with your own printer profile.
- Other files:
- rules_card_F.pdf: the module's rules card, 85 × 54 mm, a loose card
- TABLE_RULES_card.pdf: one card for the whole table (Core Rules reminder, objectives, terrain actions), two sides
- BUILD_GUIDE_F.pdf: parts list, plates, magnet polarity and step-by-step assembly
- RULES.pdf: all set rules in full, with Core Rules references and the balance maths
- source_F.zip: the parametric source code, to change tolerances and rebuild every STL
- Print all cards at 100 % (no page scaling). The Table Rules card has two pages: cut them out and glue them back to back.

### How it was made

Designed with AI assistance as parametric Python CAD code (build123d / manifold3d) and checked by automated tests: watertight meshes, overhangs of at most 45°, bridge lengths, collision checks of the full assembly, standing tests with 40 mm bases and a PrusaSlicer run for every plate. It has not been test-printed yet. The fits, the magnet hold and the strength of the lattice mast are designed, not proven, so print the flange coupon first. Makes and feedback are very welcome.