Well I had two 1/32 jigs that had a bad nipple on them. I took a grinder to the two of them and recurred them both for 15 min at 350 ish. They recurred just fine and did not have a rough spot!
I checked my oven with my $50.00 smoker thermometer and she is only 5 to 7 degrees on the low side when set to 350. So I bumped it up to around 354 and it is 349-352 . Getting ready to paint a bunch of heads and try the new time of 20 min and 350