ok, had a thought, and my ideas so far include:

  • despite primary negative test (it was quite floppy, to be honest..) - Wikipedia reference-linkrotator cuff pathology (e.g. chronic suprasp tendinitis, calcification etc.)
  • multiple rotator cuff trigger points?
  • deltoid tendinitis?

Tests to follow:

  • proper ROM and strength testing
  • proper impingement tests (Hawkin's, Neer, empty can etc.)
  • cross body adduction test for AC joint

I still think this might be a rotator cuff problem as primary obsevations somewhat point that way (over 40, pain and weakness with overhead activities, possible traumatic occurrence.. ) though 11 years of pain history..?!
supposing deltoid lesion at the insertion, is it possible to only cause pain at the mentioned angles, and not through full ROM?