Good work Matt
I'm running a .095 on my unregulated .25 mrod didn't touch the seat or stem head . My disco I turned the stem head down to .400 and stem to .71 but that is regulated to 1800 . I'm not using peek though so I don't think I should push it any farther.
You used a HSS drill blank to make that valve stem? Is the stem just pushed in to a drilled hole in the peek poppet?