It can be done, but yeah as you mentioned with the gear loops, it’s really modding the harness in a way it wasn’t intended to be used. I know everything saddle hunting is essentially borrowing gear from other specialties and bending safety rules, but for a newb starting out I’d be very reluctant to advise modifying the life support equipment itself- even if the belt does run through the belay loop. (Unless they decide they want to undertake that risk themselves knowingly.) That’s where I’d love to find an entry-level cost harness that provides both LB loops and bridge functionality as part of the tested design from the manufacturer.I tied my own with 1" webbing. Made a full loop through my belay loop and gear hangers. Not counting on the gear hanger to support weight as if they broke the linesman would be supported by the belay loop.