Hi Herman,
Used all Kawada except ball diff and wheels. I'll post pics of the setup I used last Saturday in the Kawada section of the forums. ESC is an ES-01 that is rated at 12A max and 4A continues I think. Chuck mentioned some ESC that I can't remember the name of that is similar to an Orion Flash. That thing can handle huge motors. I think he's planning to put 5-cells

on the TripMate if he decides to get one.
Speaking of batteries, here's a link of NiMH batteries available from Nexcell:
http://www.battery.com.tw/english/spec.htm
You could put 8 1/2AAA cells in a TripMate or Mini-Z! (assuming your ESC can take it). Think the Yokomo charger will work on both NiCads and NiMHs?
Let me know about the Kawada.
Jake