I thought about doing that Allen but my flooring is a 1/4" a the sub-floor the same. I will likely lift it though and do that so I can trace the lines I need to cut. I do like the trim you put on yours. I was not planning to put any on mine. That will leave a 1/8" - 1/4" gap around each hatch unless I just cut the interlocking edge off on the sides.
As for being done, I am not even close. I am replacing the waste lines (including vent), and I may replace the water line as well. I also think I am going to run PVC from the wash down pump in the engine room to the anchor locker. Then, since I now have access to the bilge areas that have not seen the light of day since 1996, I am going to clean and paint them. I also have removed the w/d and plan to line that with cedar for linen storage. Lastly the finish on the windows around the ports needs reifinished so I am doing that too. I want to have that work finished before I lay the floor so I don't screw the floor up. The photos on the previous page are where I am at now. I am not able to work on it this weekend or next but will be out there on the three day weekend following. A couple weeks after that I should be able to dewinterize the water system and lay in the sub floor. So the floor probably won't be finished until the end of Feb. Just in time to start the season.