Greg does fabulous work, his machining is unbelievable. He developed the tooling, and even sells the video's, that have taught other machinist to do this level of work.
I've got two rifles he's built, you really can't believe what a Remington 700 feels like when he's done. When the bolt locks into battery, with those sleeves on the bolt - it feels like a vault closing.
Last I knew, his current wait time for action truing and chambering was nearly a year.
If you aren't familiar with his work, check out his website http://www.gretanrifles.com/