Question to you guys is how well do the DC motors handle heat when running at different RPM's?
I’v had no issues with motor heat... i could confidently push my spindles much harder if I needed to.
Where i do have concerns is the ESP (speed controller) they do get hot... iv not blown one yet but i bought a spare because i thought i might with the amount of heat they push out (no problems though so far) at £20 (ish) its silly not to have a spare.

with a 12v 350w power supply the majority of my spindles are vastly under the “claimed” potential and iv not once thought I needed more power/torque… im sure our honorable speed freak friend Jonathan would want more speed n torque (you would need the extra speed if you wish to cut wood…I’m cutting plastic 90% of the time, I don’t cut any wood at all)

if your cutting wood and alli/plastics its worth weighing up if making two spindles is easier than dealing with pulleys on one ?