I'm fairly new at scrollsawing and after reading the posts early on about the power switch on the 788 failing because of the dirt, I put it in the "ON" position, taped over it, and installed a foot switch with momentary contacts. That means I have to keep my foot on it when I want the saw to run, so it's a bit like a dead-man's switch for trains and boats. It's a lot faster than reaching up and turning the saw on or off with my hand and lets me keep control of my project with both hands. Love it!
I don't adjust the saw speed before turning it off or on. There's really no need.