Ok sliders I'll try to answer your questions here.
essentials:- a front one way, some M3 washers to lift the rear pulley mount (tilts it back a little and tensions the centre belt) 0.5mm(rear) 1mm(front), I recommend getting either the wide angle CVD's (always rebuild the CVD's when you get them either in the kit or as option parts) or some SSK's as they'll reduce wheel chatter at full lock with the stock steering sweepers.
optional parts:- alloy suspension mounts and 1mm M3 washers (don't forget to get the suspension balls tamiya ones fit too.), spur gear support.
essentials:- a front one way, some M3 washers to lift the rear pulley mount (tilts it back a little and tensions the centre belt) 0.5mm(rear) 1mm(front), I recommend getting either the wide angle CVD's (always rebuild the CVD's when you get them either in the kit or as option parts) or some SSK's as they'll reduce wheel chatter at full lock with the stock steering sweepers.
optional parts:- alloy suspension mounts and 1mm M3 washers (don't forget to get the suspension balls tamiya ones fit too.), spur gear support.