I was tired of the original M35 starter button intermittently failing and replaced it with a momentary on switch and cover. It's nice to have the truck start reliably. This mod was around $16 in parts from Amazon.com.

Swtich: https://www.amazon.com/gp/product/B00...
Cover: https://www.amazon.com/gp/product/B00...
2 crimp tool connectors for attaching the wires to the switch. I already had these so no link.