interesting, thank you BlueB! I think what I'll end up doing is just mounting regular bindings to a board. I'd like to get a cheap mono to start before I go and drop $500+ on a new one. So, it'd work fine to just find a used alpine board, plug up the old holes and just mount up some ski bindings on it? Is it 100% necessary to use an adapter plate if I'm using alpine bindings?
Also interested in anyone that has a used mono set up.