I've been plagued with rear bearing play from day 1. Even with the hub nut tightened to FFT, there's still play. This caused rear wheel steer!!
I bit the bullet and removed both carriers to investigate further.....I discovered the bearings were slopping around in the carriers and could be pushed out by hand!!
These were new carriers and Whalley supplied bearings. Both were pressed in successfully and run for 1500 miles.
I'm posting them off to Andy @ Amtech in the new year to investigate further. Will update with results when known.