I have an old Mister Twister still working for many years.
My Friend and I bought them at the same time and his died after one summer.
I tried to get him to tape down the button but he thought it was not safe. It may not be safe but I did it anyway. I believe it's better for the knife to run continuously
instead of on and off for each fish.
I have it plugged into a cheap power strip just incase I need to shut if off quick
I have cleaned thousands of fish over the years - including 100's of white bass at one time
Wal-Mart has the replacement blades for cheap