installing a 8 point roll bar this weekend TURBO TOAD

when i watched the guy do my dads cage he cut small holes in the floor right under where the re-inforcement plates would go for the main hoop. then he tacked the plates down and tacked the hoop to the plates. he then tacked the rear brace bars to the hoop and let them sit in place in the trunk area. once he had it like he wanted he cut the tacks for the floor plates and the hoop and dropped the main hoop down into the holes in floor so he could get a nice weld on top of the rear support bars without burning the headliner. he then pulled it back up and put the plates back in and welded them off. the he welded the hoop back for its final time.