I have lived off grid for 20+ years and i build everytrhing myself. i was raised with the mentality --you never buy something you can make yourself--. because of this i have a growing number of --how i built mine-- pdf documents-- that i sell . documents include 1-how i conveerted a fuel oil furnace to burn waste oil. 2-how i converted a truck alternator into a stick welder / dc generator for circular saws ect.. 3- plant growth stimulators from magnetic to ancient energies that science says doesnt exist. 4- different ways to rejuvenate lead acid batteries if they are not completely broken 5-turning a car alternator into a permanent magnet alternator(pma) for building wind turbines 6- many more available and more coming all the time i also sell wind system slip rings for the do it yourse