I will be removing my swing keel soon in preparation for refinishing. I have a plan for the safe removal and re-installation, but hadn’t really planned to do anything more than a basic strip, fair and reseal to the keel itself. I was recently reading $tingy’s blog about his keel refurbishment and he mentions the castings being flatter on one side and the performance issues it can cause. This made a lot of sense to me as my boat has always sailed better on a port tack than on starboard. On mine, the Mexico side is noticeably smoother with a fairly consistent shape whereas the other side is rough and inconsistent. So I’m now giving more thought to profiling to the recommended 13% NACA foil shape. I’d really like to hear from anyone who has done the foil profiling and what you felt about the performance before and after. Do you think the extra time and expense was was worth it vs merely fairing smooth the original shape? Would you do it again? Also, did you use the CD template which $tingy claims actually produces a 16.5% foil or did you profile to a true 13%. Bonus points if you have done both and can shed some light on any notable differences.