Fixed the problem with my left hook
The trainer I do drills with always gives me shit about how wide and telegraphed my left hook is.
Tonight we figured out that the problem wasn't directly the left hook, but the right cross setting it up. We found that I was overextending the punch, which put me out of position.
Interesting because I've been practicing it by setting it up with the right on the bag but the bag keeps the punch from overextending, so you don't see it until you work the mitts.
Anyway...thought it was ironic that the punch showing obvious problems wasn't at fault. Once I put more snap and shortened the right, the left came off much better.
Hope that helps someone else.