If you want to spend more than 10 minutes with it up ( and who doesn't?) then get a harness, I use one 80% of the time with my BII 4.9, I initially bought a cheap(er) one with webbing straps and having been dumped on my ass twice in quick succession injured my coccix ( or however it's spelt) and have invested in a wipka seat harness, which is the 3rd best thing I posess, soo comfy and ir is excellent armour for my ass, pelvis and lower spine. if there is a chance I will get lifted off my feet then I wear my seat harness as this is a very painful lesson to learn