Actually, I already have a pair of oars for the thing. In my younger days, I did the "wind ran out and I''m stuck in the middle of the lake" thing. No fun at all. A set of oars for backup was an absolute must!
Actually, the only thing I was after was a general feel for the proper size of mast/sail-rig and if experience indicated that an adjustment was needed, I could work from there.
Soon now, so soon! Melt snow! Melt already!!