I need help, there our so many cool possibilities out there. please give your opinions on these choices. Custom motored bikes sells a 50inch framed cruiser for $235,worksman inb $339, micargi mustang or puma $289, genesis onyx 29inch $149, or should I just by a frame $75 and build my own I have plenty of spare parts, I would'nt have to buy much to build one. Also does anyone know if the Grubee bikes are still available, those are literally made to motorize. Thanks for the help.