New Build, can I get a sanity check?

Hello all, this is my first build and I wanted to get a sanity check on my parts Controller - https://www.amazon.com/2-4GHz-3-Channel-Transmitter-Discontinued-manufacturer/dp/B00FS2U9BA/ref=sr_1_1?ie=UTF8&qid=1510988815&sr=8-1&keywords=FS-GT2B+3CH+2.4GHZ Motor mount - https://buildkitboards.com/collections/motor-mounts motor 6355 190kv - https://longhairedboy.com/collections/all/products/totally-bitchin-190kvs-6355-electric-skateboard-motor Truck - https://calibertruckco.com/product/ii-forty-four/ Wheels - https://www.ebay.com/itm/Cal-7-97mm-78A-Longboard-Flywheel-Skateboard-Orange-Wheels-Free-Bearings/263173344790?hash=item3d465a8e16:g:4BgAAOSwWLFZpIiq:sc:USPSFirstClass!90720!US!-1 Wheel Pulley - http://www.electric-skateboard.builders/t/flywheel-48-tooth-wheel-pulley-download-cad-and-stl/33773/9 Belt - Not sure what size I should use? 2x Vesc or FOCBOX, depending on the enertion sale My battery situation is TBD, but i have acces to a spot welder so I am thinking of building my own 18650 pack, should I do 12s or 10s? I am still researching batteries.

Thank you!

Im suggesting 10s since you are close to 60k erpm with 190kv at 12s, but you have focboxes so it should work