Razor custom products belt drive kit for a phoenix bipod. Picatinny rail mount handwheel you mount where you want. There's a drive unit that bolts to the phoenix bipod and a pulley to go on where the hand wheel is. Connect with a belt of whatever length is needed. I've probably got some belts around I'd I find them, otherwise McMaster Carr has any length desired. $100 shipped. Don't bombarded me with questions, it's basic physics boys and girls. Use your brain and your fingers and bolt it on