Not having done it myself, but I looked into it before and to change to the new mounting involved mucking around with the holes (I think that it was going to require drilling new holes or re-tapping the old ones to a new thread). I decided that I wasn't confident enough because if I made a mistake (and you only get one shot at it) it would require bolts and nuts rather than screws to hold it on, which in turn requires installing an inspection hatch to get access to the inside of the hull to secure the nuts on th bolt. Also I was given advice that you need to have a securely mounted drill to drill the holes so the drill tip doesn't slip when you hit the metal plate under the fibreglass.