Thanks for the replies guys, I think that's everything sorted
As for the TRX connections... I never realized that the metal connectors are just really hard to push in all the way and it wasn't a case of my wires being too chunky after all.. just took a bit of firm prodding with a flat head screwdriver and a bit of praying that I didn't slip and stab my thumb
My Mamba Monster ESC/motor comes with 6.5mm bullets so I may switch to them soon. I'll see how things go,
Cheers!