Plenty of info related to this hook is contained in the various threads on this site. Several methods have been employed to remove it. Some reinforce the inside and remove the hook at the transom by grinding. Others, myself included, have built up the low spot which goes forward about four feet. The hook was created to add stability and control to the hull by increasing the amount of wetted hull. Doing so has the detrimental effect of limiting top speed. Some folks remove it, others leave it be. Personally I chose to remove it, on my timi, but left it in on the cvz