ANY OF YOU EVER MESS WITH THESE THINGS AT ALL??? IM BUILDING A 20' FRAME UP INTO A CHOPPER AND WANT TO PUT A MOTOR ON IT..... WHATS YOUR OPINIONS??? ANY HORROR STORIES... DO THEY LAST, ANY SUGESTIONS OR RECOMENDATIONS ON WHAT PARTS TO USE, OR WHAT SUPPLIERS TO GO THROUGH???? IM GUESSING IM...