I had the same problem with my older H16. I had a machinist make me a new dolphin striker from 3/4" stainless steel rod and he tapped out the mast base to accept the larger threads. Plus I had him put extra threads on the new post so that I could put a nice big 3/4" nut under the cross bar. I put a little epoxy between the nut and the cross bar as bedding compound. He wanted to charge me $10.00 but I insisted on giving him a crisp $20.