Here are photos of how I resolved the problem of the Z-Min adjusting screw hitting parts of the printed model:
The first photo shows how my extruder end looks now. I think you can see that the adjusting screw is a few mm above the level of the nozzle end.
Photo #2 shows what I cut off from the adjusting screw. During reassembly I realized it was better to remove the washer at the top end of the adjusting spring, so that is the washer in the photo.
Photo #3 is the tool I used to cut off the end of the screw. It is a clone of the standard Dremel tool with the default cutter disk on the end.
I'll be happy to provide detailed instructions for how to do this for anyone who is interested. The whole procedure took about 30 minutes.
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