I came across the following passage regarding a DIY router speed controller and I was wondering if anyone could verify the validity of the concept. "A tip for you router users. Royce i know you use quite a few routers on a steady basis. this is for the guys with routers that use brush assemblies. Run your routers on DC power. your router will run 40% cooler and 40% less screaming noise. your torque curve will increase and carry over a wider rpm range. my dewalts are old and on the original brushes. here is the parts list for a DC power supply. the three main parts are: 1. 1500 watt AC rotory dial dimmer switch.-any home depot 2. 200 volt 25 amp bridge rectifier -- nothing less 3. 200 volt 10,000 ufd DC capacitor -- the voltage can be higher but not lower. you will blow it up. this is how you wire it up. 120 ac line volt to on/off switch -to- dimmer -to- rectifier -to- capacitor --to- on/off switch -to- router. this setup also gives you variable speed control. my box has double outlets . you can plug any extension cord in and run a router 25 feet away . i run two routers off one power supply no problem. bill forgot to mention the the output will be 20vdc to 185vdc variable. this depends on the makers of the dimmer and rectifier. you can use the 185 too, it wont hurt the router. bill" <source> The goal behind asking is in regards to turning one of the little 30,000 rpm screamers into something more usable. Any help appreciated. Thx.