H2 V2S Revo Toolhead for Duender

This is my take on a toolhead for the Duender. It uses an H2 V2S Revo extruder from Biqu and takes inspiration from the EVA 3 system for wrapping the assembly around the gantry and placing the part cooling fan on the back. This toolhead is designed to work with an MGN12 rail, and you will only need the H block or C block version of the front, depending on what kind of bearing block your rail came with.

The fan duct is borrowed from the MAD Modular Air Duct system by Predy and the cable guide is borrowed from the EVA 3 system by McAbra. Any of the ducts from the MAD system should be compatible, but I have not tested the performance of them all. 

Required hardware is as follows:

12pcs M3x8mm screws

8pcs M3x12mm screws

2pcs M3x20mm screws

2pcs M4x20mm screws

16pcs M3 heat set inserts

2pcs M4 heat set inserts

I learned the hard way there is a very specific order of operations to follow in assembly to make it easy. First, attach the belts to the front using the belt clamps and M3x8 screws, then attach the front to the bearing block. You may need to add a piece of paper or cardstock between the block and the front if the clamps rub on the rail. The top, bottom and back can be assembled with M3x12 screws, then that assembly can be be attached to the front with M3x12 screws. The extruder can be mounted with M3x8 screws, and the heatsink fan uses M3x20 with the fan spacer between the fan and extruder. Last, the cable guide and fan duct can be mounted with M3x8 screws.

This may not end up as the final version as I have 2 gripes. Mounting the cooling fan on the rear of the gantry cuts about 25mm off the positive end of the Y travel, so my duender design, which can be found here, pushes the bed far enough forward, a brace across the front uprights can't be installed. My other complaint is that having the extruder mounted in this orientation makes it impossible to get the nozzle all the way to the right side of the bed, so I lose about 12 mm off the right side of the bed.