John has an excellent reputation. Before you send it to him you may speak with your stocker, he may have his own requests regarding how closely he would like it profiled etc. Additionally if the pattern has any issues they should be addressed before it goes to the duplicator. I spend quite a bit of time getting my patterns in top shape before I put them in the machine. It makes a big difference.
Are you using a Hoenig?
A +1 for John- he has done four for me. A recent conversation with a stock maker friend indicated that John has really improved his turn around time, but of course, what that is currently, only John can tell you.