Summary

I converted my 144001 to brushless complete with cooling fans. But I couldn't fit the body shell on. I looked at https://www.thingiverse.com/thing:4543267 & https://www.thingiverse.com/thing:4618466 but decided all I needed to do was raise the shell up by 10 mm and not do all the other stuff. Anyway these friction fit on top of the existing posts. I made the mounting hole purposely tight and I had to ream to 4 mm afterwards. When tested I glued into place. PLA or PETG both are strong enough with 100 % infill.