Seems to me in ur article u make it sound as tho all techniques b4 SHSBC were quickly abandoned. Seems to me not so; a few stuck; and the some of the 1s that did so became part of the bridge. In fact u can see the bridge of the 60s in COHA.
Saint Hill Special Briefing Course. A complete study of all the auditing materials and lectures up to the OT levels. Certification is a "Class VI" auditor.