I got the alloys and tempers wrong in my original post: they should have been 7075T6 and 2024T3. I appreciate you not holding my feet to the fire over a technical issue. The 6061 is obviously at a temper other than "0" and is a stiff feeling ring that will sit well and fits the ring surface on the A/C ring area perfectly. I guess we have to give mention to the makers of the center console to have a consistently reproduced version that aftermarket parts fit into so well. As far as the 6061 alloy material, we do use it in areas on aircraft that do need extra corrosion resistance. Thanks for thinking to use it here as our hands will contact the rings and leave many acids and such that will dull and corrode the aluminum surface. I still advocate dousing the rings in alodine 1001 Clear but I don't know where the large majority of forum members can acquire it, it is a Hazmat substance that is usually limited to aviation folks. As you say it is in the inside of the vehicle and my anality of keeping it shining is probably limited to me. Thanks for making a well-fitted good looking product that will further the individuality of our very unique cars...

Cheers.