Oops, sorry. I didn't mention that I am an instructor and have been teaching rejoins for 20 years or more but in tandem aircraft. In the tandem environment as AoB increases both cockpits can still see lead whilst on the line. In a side-by-side cockpit the pilot on the far side, away from lead, has their eye line lowered so the opposing coaming/side wall obstructs their view, so this cannot work. Hence my question, what technique does work? I cannot remember what I was taught during UK EFTS.