Originally Posted by SKEGGERNAUT
These are my concerns. Will the integrity of the welds that mount to the floor of the main cage be compromised from re welding again.
I don't really see an issue here as long as good welding technique is used. If the original cage was DOM, it was already annealed in the heat affected zone from the first weld, so the benefit of cold drawing have already been removed. The fact that you're using new plates, gussets, etc. takes care of whatever concerns I might have with doing something like this.
If you think about it, frames and cages get repaired or modified quite a bit by cutting at a weld, then welding new pieces in. I don't see what you're thinking about as being any different than that, other than being a whole lot of work.