I am in the process of changing my
genoa car system for #1 & #2 headsails from pinstop to fully adjustable, with a control line lead back to the
cockpit. This requires a double turning block at the forward end of the
genoa track.

I can either install a double foot block, bolted through the
deck, or just use a standard double block, hung of the base of the shrouds (I'm thinking webbing strap). Foot blocks have the advantage of being fixed/solid, but the disadvantage of additional holes in the
deck (I'm a fan of not making holes in my
boat as a general rule). Hanging a double blockof the base of the shrouds is ok, but is the additional fore-aft loading on the
shroud base/cheek plates a cause for concern?
Any suggestions / comments are appreciated