A customer I'm building a machine for has placed his eyes on the Bosch Colt (PR20EVSK) router from Amazon, since he'd like speed regulation and the local options are very limited (I don't want to use the "local router + SuperPID" option this time, since maintenance could become a problem). The existence of precision collets for it is nice, and the router itself seems to have a pretty good reputation among CNC builders.
Regarding this, I have some questions:
a) Can we safely use a 220V -110V step down transformer with this router?
b) How beefy should the transformer be?, does the start up sequence consume more than normal?
c) How efficient is the so-called "constant response" system in it as compared to everyday's built-in speed control? Could it be affected somehow by the voltage conversion process? e.g.: the circuitry relying on 60hz mains (we use 50hz).
Thanks in advance.