Hey, that gives me an idea; I don't have a snow shovel, but I do have a pretty good sized scoop shovel. Talk about power. Just kidding Dave. Actually, I have been curious about GP paddles, but I used to have an issue with hand placement. Now that I've changed my technique over what it used to be, I don't think that would be a problem.
I have been a wood worker for so long I can't remember not being one. Anyway, I've been thinking about building a GP and it certainly looks like it should be a lot easier than a Euro, which I've already built. I guess I'll have to keep my eyes open for the right piece of wood. Or, I could laminate up some of the wood I've got laying around.
I think I would stick with about 90" for lenght and about 2 1/2" for width of blade. Do these dimensions sound about right to you? Does your GP have drip rings?