I about to build my own engine gantry. I have the hoist and all the tools needed (welders and etc) Do you guys have any pictures of the gantrys you use or how heavy of material the frame is made from? Ive seen some portable units at the races and they seem fairly lightweight and do well. I dont plan to lift anything more than a BBC or hemi motor and tranny with the unit. The top beam size and etc would be good to know. I would like to be able to collapse the unit and store it also.