I got a couple 300 watt air cooled spindles in the shop, is there a 52 mm size spindle holder available?
I found they are quite a lot lower cost than the routers at less than $100 each delivered by DHL from China.
ERll collet and 11 bit size adapters.
I wrote a customizable tool holder model in OpenSCAD, but I didn’t end up testing it because I found a Thingiverse model for my exact tool (a crappy Harbor Freight cutout tool). See here if you want to give it a shot.