As long as you have proper airflow to the engine from an outside source I don't see an issue of overheating. Canvas sides are fantastic and do not add much weight at all, but one doesn't want to bounce against them in heavy seas.
definitely pics, i have a 30 young bros as well, i have a drop down door over my starboard side hauler, ill take pics of it tomorrow. whats your cruising speed and economy with that 220 cummins, also pics! would love to see what you have so i can get some ideas!
last season was not kind to me. Too busy with work (home and the office), and the few times i could make it out i couldn't get crew. I can't run the flybridge alone, safely. so i've got it up for sale and want to move into a nice DE. I love the love the looks and ride of a DE, and know I can run it alone much more safely than the fbc.