I thought you guys might wanna see more of this gantry assembly. i decided not to use it because i want something a bit different for this. i will stick to my plans. i put lots of work into it though. its made of john Ks window channel, but used totaly different. i riveted a bunch of it together to for this structure, then painted it.. took an evening... then i mounted a bunch of poorly machined aluminum bearing blocks.. TAKE time when seting up your drills and cuts! its worth it.