As you can imagine, Greg is very busy. And rightfully so, he's damn good at what he does. Give him a day or two and he (or Jenny) will respond.
I sent my M1.0t to him quite a long while ago to be restored and get the mkii opt 001 upgrade. I don't regret it at all. That upgrade takes a damn good amp and makes it a beast! You won't regret getting it done. Plus it comes with a very good warranty!