Just wanted to post the final results of our head project. We started out with a Groco k ( original factory) then replaced it with another Groco k which was defective, exchanged that head with yet another Groco k which was also defective. We then bought a raritan PHC and LOVE it ( well, as much as you can love a marine head). Anywho, here is the final results, we had maritime sanitation install it ( less than 200 bucks including fabricating the new false floor). We used starboad to extend the floor a couple inches to accommodate the new head footprint.