https://www.youtube....3Skt63oQ/videos

If you go to Youtube "SLOT RACER" has some great 15-30 minute technical videos on building cars, motors, tires, needed tools and supplies.

They seem to be adding more tech videos as time allows. Great for beginners and those that have been around a while.

If nothing else you might pick up a trick or two or come up with a new idea.