Yeh i didn't intentionally copy simons setup, it just sort of happened... pretty sure simon runs the same EBC as me profec b II. I bought the gate and manifold together used for $1100 so not %100 sure on the spring but I think its 1 Bar..
On the subject of cheap manifolds I have had bad experiences in the past with the Stainless items they crack sooooo easy its just not worth the hassle and personally i wouldn't trust an ebay china gate either.