Just to add my 2 cents.... @Stan Galat took the words out of my mouth. Given the global climate we're in right now, we really need to be more sympathetic to business owners. It is simply mind boggling some of the wait times out there for various products.......which I find may be a good thing. We are/were definitely a society of RIGHT NOW......waiting 4-6 weeks for that thing you want was not good enough-so have a drone delivery it to me within the hour.
I'm sure you want you car Brian. It has been some time, and I realize you're without your speedster. I also know you're incredibly talented. I'd meet with Greg, review the items that need to be done. Come up with a game plan. Perhaps he'd be able to work in a few, and knows other shops that would be able to assist with other items you cannot do yourself.
Greg, like the other builders, just had a perfect storm. COVID occurred and suddenly everyone is aware that life is short and precious. Therefore lets not wait to get that speedster I've always wanted. Now these shops have a huge backlog.....but no parts or staff (I'm assuming that to be true even if not in their shops directly). I'd give him a bit of a break. It still appears he's not sacrificing build-quality in order to crank out these cars by using readily available inferior parts.