What size WG do you have now? Most aftermarkets come with about a 38, and that fine.
You NEED to get that screw first, then go get an appropriate WG spring for your boost. Or just get a new wg.
for him to use a BC in his case he would have to modify the boost signal up from what he wants to the WG. (bump a 7psi signal to 11psi to match the spring) The point of a BC is to lower the boost signal to the WG
