RE: correct Nitro??
I'd leave the nitro alone on the TT 46
But, IMHO.......NO GREATER THAN 5% NITRO for the MVVS.
Anything greater than that in the MVVS and it will not run worth a rip. BTW, I used a cold plug in mine.
The MVVS motors are designed to run in Europe where Nitro is like gold. So therefore, they run best on 0% to 5% Nitro.