Daren...
Thanks for the kind word on behalf of myself, David and Brady. Answers to your questions:
1) Yes, I have sent it to others. One note: it requires use of both eCabs and PartWorks to complete as the exact motor geometry was unknown at time of design.
2) This box is parallel only. My testing showed very high temps when connected in series.
3) It is simply a pivoted flapper valve made to mimic the check valve provided to our user group by Brady.
I would recommend using the 4 motors as it will allow you to hold most anything (that is reasonable). Getting the CFM over 400 is the single biggest advantage of this system over most others.
