Belts are just dangerous unless its a prewire, but even then I'm jumping in rafters or under houses so much that it just becomes more of a hassle. We use small zip up pouches for rough in, that can be on a belt, but no big pouch belts.
We do a lot of rough in also and would never try wearing bags through a house.
I still find myself using this more than anything.
Use this for rough in
And this is a service bag that might replace the electrician bag, but I don't like how the zip top folds in. However neither are perfect and I wish Veto Pro would make one.