Please, please replace that poor 12 gauge wire going from the 120A breaker to the power distribution block with a 6 gauge wire appropriate for the load. Otherwise its bound to go up in smoke once you get a few of those vics pulling amps - and that wouldn't be pretty!
And run a separate lead for the second maxi, as previously noted.
Other than that, it looks good - nice and compact and fairly tidy wire bundles
EDIT: Actually, I think based on <R57> you may need 6 gauge wire from the power distribution block to each of your breakers as well. I'm not an electronics guy though, so someone should check me on that. I couldn't find anything stating that you MUST have 6 AWG there, but the 7th bullet of that rule suggests such.
- Jeff