Product review (5 stars): Great part, but recommend pretreatment before installing.
Great quality part.  However, I would highly, highly, recommend treating the aluminum before it is installed.  I ordered a spray can of zinc chromate and a spray can of silver aircraft paint.  I washed the part with soap and hot water and allowed it to dry throughout.  This removed any oil and dirt so the zinc chromate would properly bind to the aluminum.  Afterward, I sprayed it with the silver paint.  This will provide a good protection from corrosion due to dissimilar metals.  The drum is stainless steel, the bolts are galvanized steel, and this spider arm is aluminum.  This is why it failed; dissimilar metals caused corrosion to build up, and that lead to stress corrosion cracking in one of the support arms.