Saddles balance the car better so would advise that. I would recommend you guys telling me the distance between the rear battery post to the front battery post in MM so i can see if my Lipo tray i designed will be a direct fit. Also i need the distance from the front post from left to right, all measurements from the centre of the screw hole. If yes then you can buy Lipo saddle packs no more than the vampire 4400 as any bigger they wont go under the top deck.
Motor i would advise a 6.5 and liked the Losi as it was cheap. Otherwise get an lrp x12 but to use this properly you will need the lrp sxxtc esc. If too pricey losi do a package deal with motor and esc but the esc is not always reliable. The tekin rs pro esc is what i used to use and never failed me at all.
Ratio, well you PM me what you have bought and i will give you a starting point. You need the motor to come off after a five min race at a hand warm temperature, quite the opposite to brushed motors where they come off really.
Hope this helps.
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