Modified INDX tool holder for magnets D5 x 8 mm (captive & back inserted) and D4 x 10 mm (captive)

I ordered a set of 8 0.25 mm INDX nozzle tools from Bondtech directly. The plastic part on the tools supplied by Bondtech have a much rougher surface finish than that on the 0.4 mm tools supplied with the INDX kits from Prusa. See the photo below as an illustration. (Left: 0.4 mm nozzle tool from INDX conversion kit purchased from Prusa. Right: 0.25 mm nozzle tool supplied directly by Bondtech.)

My Core One + INDX kit as supplied worked very well with the supplied 0.4 mm tools. But with the 0.25 mm tools supplied by Bondtech directly, I started experiencing frequent tool parking failures.

MIRE's modified tool holder with stronger magnets seemed like a good possible solution. I didn't have D4 x 10 mm magnets readily available, but I did have some D5 x 8.5 mm magnets, so I made a tool holder version for these.

I designed the following variants:

1. Variant for D5 x 8 mm or D5 x 8.5 mm magnets, back-inserted into the tool holder.

2. Variant for D5 x 5 mm magnets, captive in the tool holder.

3. Variant for D5 x 8 mm magnets, captive in the tool holder.

4. Variant for D5 x 8.5 mm magnets, captive in the tool holder.

5. Variant for D4 x 10 mm magnets, captive in the tool holder.

Print as recommended for the standard part: PETG, 0.4mm nozzle, 0.2mm layer height, 20% gyroid infill.

For the captive versions, add a pause in the slicer at the start of the first layer above the cavity for the magnet. When the print pauses, add the magnet (pay attention to the required orientation/polarity), and then continue the print.

I tested variants 4 and 5. With both, after installing them, I successfully completed several multi-color 0.25 mm nozzle prints, confirming that it works!