Yo, Paul! Check out the assembly directions. You can do it!
Directions!
I wouldn't buy the kit if I were you since the whole EV has to cost $500. I think you could do the controller for maybe $300-350 if you order the stuff yourself and can get that horrific heat spreader drilled yourself somehow.
Order directly from Digikey and mouser to save money. I can help you all you want for nothin!
Alvin from down south had a local machine shop drill his 3/4"x1.5"x8" aluminum heat spreader for free! You could have the first $500 freeway capable EV!
If you do, I can mail you a power pcb for free, since your name is Paul. And if I order extras of those control boards, you can have one of those free too. Soldering the control board is annoying, I'm not going to lie.
But I just found some replacement machine screws that would allow for you to make the base plate with just a regular drill I think. No milling whatsoever.