New unit from the manufacturer is $370. I need an analog input module to read what position the drop down sides are at so I can do 80% closed etc. Without it, it's either 100% open or closed.
Seller has "more than 10" and these controllers don't sell quick because they're not a consumer product yet they're not full blown, well known industrial name either. Stuck it on my watchlist and I'm sure it will be there when I'm ready for it.
Better brand than what I've been planning on using. This brand is sold at Grainger, a long time well known industrial supplier. I doubt I'd be lucky enough to find longer ones on clearance for my sides and if I bought this brand, it would be $2400 which ain't happening. I'll get the DIY units which will cost me $600. When/of they fail, I might replace one at a time with the good ones or I might not. Those are low to the ground and easy to swap. The gable vents will require a ladder to install/repair so I'm grateful to have stumbled on these.