is there a specific brand 4-5 pt harness that will expand substantially to fit fat people ? I am quite chunky , and dont want to be strangled , or have to lube up to slide myself into the buggy . at the same time I take my skinny kids with me on rides . so I am looking for the harness with the most adjustability and the ability to accomidate fatties ? and are most of the harness bars universal , or do the blingstar harnesses only fit the blingstar bars and so on ?