the pus power supply is a mod i did a long time ago
it's practically free considering all pc's have one and you can scavenge any retired pc. it's very easy to rig an on/off switch and find the right wires with a wiring diagram for the psu and onverall, it works great!
it just so happens that i am modifying my pit box to include an internally mounted psu
http://mini-zracer.com/forums/showthread.php?t=23352
when i get my micro-t i plan on using a peak charger but i will certainly look to doing this mod as well just for the sake of making the base charger more of an optional choice.
i hate aa base chargers, epochs have the same thing and it was the first thing to go but now i'm looking ibnto seeing if doing the same thing for that would work