Yes, he did one for me. I had him chamber it to .357 mag and later rechambered to .357 max. I shot it as a .357 mag and it was very accurate. Having him rechamber to max would likely be fine. I wanted to use the forum reamer for cutting the throat and lead but his reamer is probably just as good. I went with 3 groove rifling and a 1:14 twist.
The extractor was close to working as is. Mine had a flat surface where the extractor contacted the case body during feeding so I put a small radius on the flat edge with a dremel stone and it worked perfect. It took only a small amount of material removal to make it feed without dragging.
Ask JES to remark the barrel for you or get with Dinny to see if you can use his etching machine. I can post a picture of what the finished etch from his template looks like if you're interested.
All of my favorite creatures have white bottoms.