I lower my tower every time I enter my hoist. I prefer to keep the cannopy lower to allow for better protection and keep out elements. I bought 5mm SeaDek pre cut "Hot Buttons". http://www.seadekstore.com/hotbuttons-5mm.aspx

They are were super cheap (at $2ea.) and match the boat. I just put them down where the tower arm touches. They eventually start to wear out and I just replace. I am still very careful not to drop the arms down as I think it could still cause some damage.