Generally, people post week 1 designs and builds on CD for feedback, as you can tell by this thread. It's generally wise to take the experience of those who have been doing this much longer than you, or we wouldn't need mentor's would we?
Criticism can be constructive. If you can't take the suggestions of other people into consideration, you're doing something wrong.
As for the design itself, I'd be wary of your CIMs being behind your wheels, I've seen a lot of teams do it before, and it generally leads to wheelies when accelerating. Check out 68 in the beginning of this video for example :
Click
*Please note that this was due to unbalanced CoG, not necessarily CIM location*