KCee The MOI matching didn't seem to be enough if the static weight of the club was still too light for me
Back weighting will not effect MoI heft match. It will effect swing weight heft match which tells you swing weight is not a good heft matching method IMO. Shaft weight, head weight, playing length, balance point those are the factors to play with. Back weighting will effect total weight but it probably changes balance point more than anything to help or change fitting factors. That's been my experience over the years.