If the A class was to adopt a spinnaker, then no problem to build the boats with holes in the bows like the Marstrom.

I am not a big fan of the snail snuffer..... Tears apart the kite and slower to set / drop.

Why not build a carbon bridle like a NACRA and run a sigle forestay. The bridle will spread the load more on the bows and you can attach the spin pole to it. Run the support lines from the tip of the pole to the outer ends of the bridle and the bridle takes the load. Then include a sock on the pole like other spin cats run.