When I first was instructed on how to clean walleyes I was given an American Angler model 31000 to use and keep. I learned why it was given away. It was ok for about 6 eyes but the motor fan blew the hot air fwd that vented into the palm of my hand and it got too hot to use. At a yard sale I bought a small tackle box for 50 cents for knives and blades storage and the seller insisted I take an American Angler knife model 31000 for free if I wanted the box. Both knives are now lenders to fellows who forgot their equipment. I bought a black & decker electric kitchen knife at a yard sale for $1.00 and it lasted 2 1/2 seasons. Thinking a $1 knife wouldn't last long but I liked the design, I had already purchased 5 more B&D electric knives @ Walmart for $9.99 as the total cost was about the price of a single high priced filet knife. Hot air blows out the cord end of the B&D knife and it is very comfortable to use. I have cleaned up to 29" eyes and it is slower going but does the job on big fish. This is the 3rd season for the 1st $9.99 B&D I purchased . This year Walmart has them at about $14.00. I clean about 200 eyes and 500 perch a season.