I recently purchased a Questus self-leveling radar mount off of Ebay. Unfortuantely this unit was designed to be mounted on a backstay, and my boat (a Freedom 40/40 with a carbon fiber mast) doesn't have one. I've designed an adapter for it, which I will machine out of 3" round Al stock.
It seems that there's primarily 2 types of Al stock available: T6511 and6061. The part will be painted. Which of these (or some other varient) should I use considering the salt water marine environment?
-- Thanks, Geoff