Awesome, looks great. We are our own worst critics when comes to nit-picky details that any other (reasonable?) person would think is trivial. You've done just fine.
BTW, I think you asked about a finish for the handle. From here, that looks like a nice old piece of blackwood or rosewood. It probably has a lot of oil soaked into it over the years. Therefore, I don't think I would try to put a top coat on it (varnish or even shellac) as the finish would probably not adhere. I think it will be fine left in it's current state.
Also, just for reference, how big is the chuck?
Craig
(And, nice work with the stealth gloat showing the newly rebuilt deck in the background of the shot.
)