I actually did, only because you told me!
I understand you are frustrated but getting mad will not push them to do anything. I plan to pull it apart and see if I can re-engineer it, my buddy is a civil engineer who has a ton of HVAC experience.
I don't think this project requires those credentials but I am curious to see what he says. Unfortunately I am at least 3 weeks away from even looking at it.
2016 Georgetown 364 TSF
2015 FunFinder 242BDS traded for above
2014 Starcraft 1221 Comet traded for above