Anyone have issues cooling a 24' TH with a 13500 btu?

I don't think upgrading to less than 200 btu extra would improve cooling much.. And I'm not to fond about cutting another hole in the roof. So until I tear out the interior and re-insulate, I will probably not camp in those temps or rent a room if the temperature is in the high 90's. Colorado Rockies beginning of September wont need A/C.

The correct way would be to add 1" furring strips to all aluminum studs to make the wall 1 3/4" thick. Then reinstall everything. Astro Foil etc