I am rebuilding my Garrett 2056 VNT for my 2006 2.5 BAC Touareg with a new CHRA from Melett. I have researched widely on here and t'internet but cannot find how to establish an initial setting for the stop screw, which was supplied loose. I understand how to adjust the actuator arm ok, but not how to set up the stop from scratch before reinstalling the turbo to the car. Once in the car access is very awkward and I would rather get it as close to right as I can first. Most comments online say "do not adjust this screw" - but in my case I have no choice! I do not have access to a vacuum gauge, but do have full VCDS ( obviously only when the car is running again). I read online that there is a technical bulletin from VW - can anyone point me to it or provide it , or give me any dimensions on vanes open/closed or other information which would help? Thanks in advance.