Before I fitted my -5s I gave the actuator rods a few turns. All I did was make sure they were done evenly, assuming the original setting was the same on each actuator. I may have turned them about 5 turns tighter but this was 2 years ago.
This was to reduce the amount of work needing to be done by the Boost Controller - as stated above.
Using aluminium pipe with a hole drilled in the side of it to bleed the actuator signal, my boost holds absolutely dead flat. No EBC or boost tee. I guess you could call it a fixed boost tee.
If I was you, I would just put a few turns on the rods to give you a higher base, then let the EBC tidy things up if needed.