Hi, doing my first tdi courses & have bought some ds4's I routed the hoses the same as dirdiver.com but my instructor wants us to have 2 spg's. what's the views on this & when I do I cant get my regs set up as good. This guy is anti dir & thinks his way is the better way with everything If I could get a refund & do it with someone else I would. I think a tdi Instructor that doesn't know dir & how to set up a manifold because he only dived indys & now a breather is not good.