You could get a old foot pump, lob the end off where it attaches to the tyre & put the hose over the actuator nipple. Then pump the actuator to about 12-14psi & adjust the bar so it slips over the waste gate penny in the closed position ! job done

But anymore than that is stretching the -31 a bit & you might end up with boost creep in the higher gears or snappin the actuator bar or somethin LOL

Also check the boost in like 4th/5th gear when engine load is at it's most !

You could also lengthen the pipe from the compressor to the actuator & give it a little spike in the mid range !

Jb