How to attach a solid vang
I'm adding a solid vang to my boat, looking at Forespar's Yacht Rod. The mast fitting looks pretty straightforward, but I wonder what people use to attach these to the mast - tapped machine screws, stainless rivets... what? These are under tension when it really counts and I don't the thing being uprooted off the mast. The boom fitting looks like it may be designed to fit some sort of track. Has anyone installed a Yacht Rod solid vang and know how the boom fitting attaches?
Also - any opinions on Garhauer vs Forespar?
BTW - this is a 46' sloop with ~500 sq ft of main, so its a handful.