Success. With tvc set to 4.22 it peaked at 4.20 (confirmed with separate meter). Kinda sux that it doesn't go as advertised but that's better than the 4.18 I was getting.

Bumped tvc to 4.24 and hit it again. Came off at 4.22. Perfect. Thanks a freaking ton linkless. This thing was about to go up in the for sale thread. I still want an icharger though.