Xmod electronics upgrade
 

So i want to add a whole new setup to my gen 1 xmod and people say the the losi micro t board with the micro t servo. I notice that the losi board has 4 fets apposed to xmods stock 2 fets. Will 4 fets handle two 3100mah 40A lipo batteries and possibly a motor upgrade in the future or would i have to add an extra set of fets for it to handle it, also what kind of controllers can i run with the 2.4 ghz. Do i need crystals?