I soured a little on the RB rotary yesterday. Besides seeing those things in HD on unisprays. Anyway I'm trying them both on retrofits to decide which direction I want to go. The RBs have a heavier spray which appeals more to HO. This job was poor pressure and a previous service man had replaced all the 15' with 12'. Now coverage was a major issue. So I tried the 13-17 RB and they barely threw 15'. Switched to 2000 MPs and got the full coverage. I may just carry both but I think the RBs need more pressure and need to be on prs heads whereas the MPs can be used on a standard 1804.