Join Date: Oct 2006
Location: Callao, VA
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Re: Repacing centerboards on a Gemini M
one is to get the boat up high enough (rack and rig or sling time, but the process is time consuming ie. greater than a couple of hours unless you have tools and materials and have done it before) dropping the old boards, reinstall the new.
two, you can block the boat normally and trench a path to a hole beneath the ama, and then drop the old and replace with the new.
Make sure you have correct hardware and tools. I would contact Gemini and spare the hardware well in advance and simply replace it while I was in there...rather than expecting to remove/reuse the existing set.
two man job for a while, unless you are going to run back and forth and rig something to hold things in place.