That's the problem we had. Not only is actually making our duct work work probably not physically feasible, I can't find an HVAC company that actually tries to solve the problem I have.

It's "I'm not sure why you think that splitting my HVAC system left to right (the easy way) will help my problem with HVAC front to back."

I have a PhD in engineering and strongly respect the trades. It's just don't be stupid. And HVAC have to know a lot about all the various trades.