the springs are color co-ordinated. The blue means 15psi. The red is like 10psi or something like that. Ian if you did not get the 15psi spring, but want one let me know. If you want a higher base, I have been told to double them up.
If you have the regular wide spring, you can increase boost by tightening the allen key on the top pf the gate, or by replacing the spring. I remember yours Ian was supposed to have a 15psi base, so it sounds like ITS may have labeled your gate wrong and you didnt receive the correct spring. You probably got the 7-9psi spring. Let me know.