The way you have it will work fine. What you need to do is first use your adjustability and screw the arm so that it is at the longest setting or close to it. Mabye even holding the wastegate open a little. Then run the car and see what psi you get, it should be pretty low. Then come back and tighten it up one or two turns and run it again, this will raise the psi. Repeat this until you get your desired boost level or you hit the max. If you hit the max and can't get any more boost your going to need a boost controller.

 

Hmmm.... I'll have to look at that when I get home.

Thanks for your advice... I thought I had it on there a little too tight.