Thanks Guys, For clarification, I can't do all day sits either, just 2-3 hours- my issue is lower back pain and I think an air pillow behind me may work, along with the padded front bar mentioned. I thought adding a light-weight alum-tubed foot-rest may keep strain off my lower back. I do have a LW climber (swapped the seat for a net) - like it much and added a 2" wide belt around the grip-belt arms that hits my lumbar area quite well-maintaining the arch in my lumbar. I have to stand at times, too, but can shoot comfortably either way. I bought an older LW Assault (seems like 11-12 lbs), but haven't used it yet. The seat is higher than some lock ons, and I believe the Limit's is 20" high, too. I was just looking to spare as much weight & bulk as possible to carry in (stand + climbing method) but be reasonably comfy for a morning or evening sit. Concerned about 12V drill noise, too vs. time savings using the Woodpecker system.
Please keep your ideas/thoughts coming...