Brad, I don't want to be thought of as piling on here so please take this as constructive criticism or at least something for other to consider when building a similar system. There is nothing in the rules that make what you're doing illegal; but think about trying to exit in a mishap. In the hurry to escape the vehicle when vision can be obscured by smoke, fire, or even salt in the eyes, try not to have items protruding into the cockpit that might grab your firesuit to hinder your rapid exit. It works well in it's "as designed" form but keep in mind less obvious issues that could cause problems.
Your chassis is of superb construction so again please don't take my comment as rock throwing.
Best of luck with your project.
