the interesting thing about the hemi subluxation is the fact that it goes along with internal humeral rotation. Anatomically the superior ligamentous structures of the glenohumeral join unwind into internal rotation and tighten the gap in external rotation. Although not yet researched the addition of stimulation to the posterior Wikipedia reference-linkrotator cuff early post stroke or the user of biofeedback training for the same region, may enable to patient to minimise their subluation voluntarily without the need for strapping. Anatomically the capsule of the GH joint has several centimeters of subluxation available without muscle influence, so any strapping that is made should try to assist the muscular activity. Best of luck :-)