updates look great bobby!
Is there any chance you could post head on and profile pics please.
I'd say the chin perhaps needs a touch more work, maybe a tiny bit flatter at the bottom? (though I know you say your still working on it)
Another thing I noticed before, but wasn't sure, but are his eyes a tad too big? Though i'm really not sure on that point (it may well be too small a difference to be worth bothering with), it's hard to say without seeing other angles.
I've got some more reference shots here for you to compare too (you can never have too many reference shots!)
sorry if I come across a bit nit picky btw! but I want this to be as perfect as i'm sure you do. Bruce is one of my all time heroes!