The parliamentary model sounds good to me – just wondering, could the vice-chair be the incoming chair for the next year? It might be mixing and matching things a little, but it tends to work well in many of the volunteer organisations I’ve been a part of over the years – gives the vice-chair the opportunity to be primed for the job when it’s officially their turn and no worries about any drop off in leadership if elections are delayed etc etc. I think it would still be compatible with the current model – elect five people this year, then only four the next, and if the vice drops out for any reason then you just elect five again.