Fix_me_up

I've got a 130mm dropout spacing frame with a 120mm track hub that i've added two 5 mm spacers to either side. I have an FSA platinum pro track bottom bracket that i specifically had installed because FSA said they were adjustable for chainline. My LBS looked up the BB and said that it wasn't adjustable due to the fact it had a lip on the side to stop the threading (I checked and mine doesn't have this so mine must be newer I guess). How do I go about adjusting the BB to give me perfect chain line? I assume my spacing of the axle is appropriate, and I'm hoping I can adjust the rest just using the BB.

Thanks for the help