[glassdoctor]

Welcome to the forum...

I'll hit a couple things quick... others will have input too... and you will find plenty of info here if you do some reading.

1. You need to run a plastic center gear believe it or not. Steel gears will destroy the pinions.... the Kyosho plastic gears work great.

2. I don't know off hand which parts fit for the xray, or if there is motor mount available yet, but I know someone here has doen an xray...

3. The best combo for under $300 is the Mamba Max esc and a Fegiao 8XL. That's about $225 and you also need a ubec (voltage regulator for rx/servo) which run $15-40.

Chassis flex should not be an issue any more than nitro... ?