That's a good question and something that I might investigate.
I drove to Bendigo and back today and had a lot of opportunities to play with the boost control, mainly slowing down to 80 and dropping it up to 110 (legal limit) to see what the boost does in each gear.
What I found is that the boost will spool to the set level (first valve) in first and second no problem, but then third gear, it would boost to set level and then drop right off, like the wastegate was flying open.
The boost would eventually build to the peak level, but not until 5-6k rpm.
So tonight when I get back, I removed the new second valve (peak boost valve) and replaced it with my old bleed.
Problem solved.
I'm going to investigate another valve that I'm sourcing and try it on my car first.
I hope you all appreciate this!!
BASS OUT