I JUST posted a response to a different post/thread about this...with story no less! The gist of it: Had Sporty going on 5 years now 50K on it LOTS of pop topping...Recently, Our top dropped 3-5 inches (first time ever) while lowering in morning=concern, second time the next morning dropped last 6-8 inches with a HUGE thud=PANIC...thought a motor went out...stopped at NorthSMB Chad (our orig. builder) looked at it tested, etc....HADN"T LUBED IT SINCE THE DAY WE LEFT SMB NORTH!
He said, "I couldn't get it to drop, BUT it was DRY AS A BONE"...it was catching on side of main tube and then catch up/drop to match other side....and as stated: "these motors are almost bomb proof, BUT you have to lube it or you'll ruin your tubes."
PS Have a 90 lb canoe with gear/fishing stuffs and a sat dome on top...all SMB staff looking at it stated/thought it was not a problem, BUT centering/equal weight distribution is KEY if you are loading and pooping!! I had to leave that typo lol...POPPING the top
So now we have silicone spray in Sporty and our plan is to lube it LIBERALLY our first night out on every trip...hope that adds to the convo