must say that i have been using the bit setter method and this allows me to have a single spindle and all bits the same height. so when the cnc program pauses for the toolchange y just change the Collet-nut and bit with a separate one/spares with the correct bit and hit resume.
The idex will automate some stuff ( for my use case at least) y use only 2 types of bits around here) but the software/manual editing of gcode makes it No fun.
im planning to build a 2020 frame ( a little one) to play with the concept, when im happy how the things go then i build the cnc .
Bitsetter images:
I mainly cut acm sheets. Just a _/ bit (1/4 shank) and a 1/8" spiral
Here is an example
This machine doesn’t have the vacuum bed, but it has a floating z axis