Well, lets get the obvious out of the way:
1. Predrill all your screw holes, and if you already are, then either use a slightly wider drill bit, or predrill deeper. Maybe both. You should be using at a minimum a 7/64 drill bit, 1/8 being ideal.
2. I find, and this might just be me, but I always find that enclosure building goes much faster with just one person especially if it's the designer. Reason being, you don't have two people who each have their own ways of doing things and they sometimes don't exactly match up with what someone else is doing.
3. Nice work, let us know how it sounds //content.invisioncic.com/y282845/emoticons/smile.gif.1ebc41e1811405b213edfc4622c41e27.gif