Granted, a few members here such as Vaderios can offer their expertise on the film visually, but I can't see Ady going back on his word that only one lucky donator gets a copy, and I respect him for that.

I think it's only grudgingly he offered it up in the first place, and it seems it was first and foremost as an incentive for further donations. Not for wanting feedback. If I were Ady, I'd be exactly the same. I wouldn't want to put out more work in progress versions than necessary. I'd want it to be finished before letting people see it.