If you swap out to 43/10 truggy diffs (which do fit, I checked with my RC8T diffs and they just needed a tiny amount of shimming)
Really? I trief fitting some RC8T diffs in the stock X bulkheads but I needed like ~4mm of shimming, which is quite a lot. I also had plans for a centerdiff in my XL Flux:
Mugen MBX6Te RCM + Mugen MBX6e RCM + Savage Flux XL FLM + MERV all with Spectrum DX3S || WTS&WTB