Summit Rollcage

I'll get a basic 8 pt rollcage, I can weld in the other tubes later.I am just wondering how to create room to weld the top of the tubes.If I put the rollcage in so its tight fitting without holes in the roof or floor I wont be able to weld all around some of the tubes.An article I read put a cage in but didnt even attempt to create access for those joints so every tube was only welded 3/4.I can weld fairly decent but I would feel much safer if the cage was completely welded at every connection with a bunch of "taco gussets" thrown in.