I hear you Ron! I have a flow bench and valve grinding equipment here at the house... I just send all my heads to Dwayne these days. He has done 6 to 10 sets of heads in the last 5 years and I have never had one issue with any of them.

To the OP, there is something to doing it yourself but tread lightly it is easy to waste your time and make junk. Less is more sometimes, hard to have positive results without a bench.