Coincedently, the discovery of excessive play in the lobro came about during wheel bearing replacement. I initially wondered if I had set the endfloat too tight, as during test drives the rear of the car would ' twitch' momentarily from time to time, which felt like it was coming from the same side (RH). I could find nothing wrong with the bearings after pulling the hub off, or the brakes, which was confusing. I think I was experiencing what TR drivers had suffered - the Triumph Twitch?, when the sliding splines lock up. If not the same mechanical cause, the symptom seems the same. When I get home, I'll pull the shaft out and speak to Alisdair.