My other car is a MINI!!!!
If you've cranked the actuator arm right up, then there's every chance you've increased boost, possibly by a little, possibly by a lot!
Now, there are two potential answers here:
1. This is of course very dangerous if you've cranked it up too far. too much boost can kill your engine if it's not mapped for it.
2. Slightly less responsible answer: the ko3 is so tiny, that with a st1 map, even if you let it run wild, it's unlikely to do any damage, and it certainly can't exceed the limits of the standard fuelling setup, so it'll probably be fine.....
Either way, I'd advise setting the actuator up properly. You don't state what actuator you've fitted, is it a replacement standard one? or a Forge one? You also don't state what st1 map you've got, it matters, because some are great, and some are shyte.
To setup up static actuator pressure, you can either do it on a physically, with a variable pressure source and a guage, and increase line pressure until the actuator springs open, or, you can unplug the N75, and drive and see what boost it's making, then adjust accordingly until you're at your desired actuator pressure, around 6psi for a stock ko3.
As you don't have a boost guage, I'd bet you probably havn't got a way of measuring the crack pressure under the bonnet either.
having an AGU, you also can't log boost and do it that way! so whatever you do, you need some help!
Quickest and easiest way would be to find a mate / member with a spare boost guage lying around, hook it up as a temp with the line in through the window, drive and see what boost you're getting.
Where abouts are you?