I beg to vary. I installed UA about 10 months back and I am surprised by its general performance. Particularly the prop is sparkling cleanse - see the pic - about five months of it had been in tropical waters, the shiny spots are bare metal wherever the antifouling peeled https://oxygenchambercost00751.tinyblogging.com/detailed-notes-on-cost-hyperbaric-oxygen-chamber-79548046