I'm in $4500 for TBL from Oct 2. No refund, and no plans to ask for one.
After reading everything here, I don't understand what the big deal is really? DP have stated we can get refunds up until our machines are built. So if the final version is not what you expect or like, then get a 100% refund and be out.
And if something shady goes on at DP and they don't have the funds to refund the money, then that's when you call your credit card company and tell them that you paid $x for something that was never delivered, and they refund you the money.
No drama either way.