RC Monster RC8 Conversion, few questions

[Cain]

For the RC Monster RC8 conversion is it possible to still use the kyosho 46T plastic spur gear on the center diff?

What is the lowest pinion size you can use on the RC Monster conversion?

How does weight balance compare on the RC Monster conversion to the RCPD conversion?

what gearing is everyone ending up with using the castle creations 2200Kv combo?

Is the battery tray lowered on the chassis (ie- chassis is milled under the tray?)