center diff in an e-maxx

[_paralyzed_]

I'd like to put a center diff in my e-maxx, but without the extra gear reduction of the tranny it's geared to the sky, above 60mph with briang's speed calc. (Thanks BrianG!) It's a hyper 7 diff,48 tooth spur. I WILL run a 2200/kv neu 1515 on 5s, with stock ratio e-maxx diffs(of course aluminum cups, RR gears, fastlane combos) but with the smallest pinion, a 12 tooth, it's geared to fly! So........................................
Should I run an e-maxx tranny, or mod up the center diff like I'd like to do?
Is the neu enough of a powerhouse to push that, or am I beyond the limits?

Thanks for any input guys, I'm almost ready to start my build!!!!!!!!!