Selling a brand new controller...designed to run a water/methanol system. But honestly this thing will run a auxiliary fuel system if you want it to! Program custom tailored maps to your needs. Top of the line controller for any water/methanol system! Here is a link to their page. $300 shipped OBO
https://torqbyte.com/products/cm5-lts-water-methanol-injection-controller
https://torqbyte.com/products/cm5-lts-water-methanol-injection-controller