Please check my gear mesh

[simplechamp]

When I first installed the motor the gear mesh seemed alright, but now I am second guessing myself. The pinion is 12T and the motor is moved over as far as the mount will allow.

So two questions: Is the gear mesh close enough? And if it isn't, will going up to a 13T pinion be enough of an increase in size to allow proper gear mesh? I could probably go up to 14T if I really had to, but rather stay with 12-13T.

Thanks for looking.