Jim, I would lean towards the single bolt hub. It will secure the prop just fine and you may find that the use of a 4 bolt hub would greatly reduce your prop selection. I don't think there are too many props that small that would have a large enough hub for 4 bolts. The only challenge may be getting it to run true but based on other projects I have seen you take on here and on RCG I confident you are up to the task.