You may get a lot of flex from that motor mount, which will affect the gear mesh. The mount may need more than two screws holding it to the chassis. Check out this thread to see my motor mount. It's overkill really, but there sure isn't any flex.
Yeah I saw your MT2 thread. I know the mount isn't great, it's temporary until it causes a problem. I liked cold fusion's but I didn't like people sending money and not having a mount months later. I don't know anyone with a machine shop and e-machine wants $60-$80 and a month to make one so I'm kindof stuck at the moment.