I've never had a Campy, so it must be different from the Specialized and other similar cartridge BB. This whole process has made my head hurt... and I skipped a lot.

The ones I've used had lockrings. Spanner and a pin wrench and in 5 minutes the chainline is set and the BB is nice and snug. Used grease on the threads but no lock tite. I'd probably be inclined to see if suitable lockrings existed.

John