Buy a heat gun. Makes it easy.
@Connor_Howard HELP! When I was prototyping the plastic by using cardboard, whenever the disk went in the 2nd intake gear, it will get stuck on the gear.
also how do you connect the standoffs? do you use the screw in collarshafts?
Standoffs can be connected with the double ended coupler screws. 
mmk, but do you know what size of standoff I should use? 4"-6"?
In some of the closeup pictures, it looks like there is some clear plastic between the rubberbands and the wheel.
Can you upload the cad file again? I would like to make this bot, but the cad file is not opening. Thank you!