Heat looks alright but you should use that latter pair of settings.
If you want it to sit more flat out, say, a 3/32" chamfer on eaither side of the part. You could also try U-grooving it.
https://www.amazon.com/FOLCONROAD-Air-Powered-Chamfering-Hand-Held-Deburring/dp/B098QMDW1Z/