I’ve designed and built a couple of One Metres. Really good fun to put ideas onto paper, then watch them take shape.
The first one was fairly radical and went ‘down the mine’ in anything over about 10 kts of breeze
The second was quite successful. The third sank as a result of friend’s ineptitude..!! I still have MkII, but not sailed it in a while. Building the hulls is cheap but time consuming. One you have the rigs, sail winch and carbon keel fin it’s really easy to built new ideas and get sailing.
Never tried any of the one design classes, but friends sail RC Lasers in the winter and have a hoot!