While it may be premature, I believe the attached graphs indicate that the foil tensions are beginning to stabilise at non-zero values. We should know for sure in another 100 days or so. The first tension measurements of foils 00, 01 were made a few weeks after they had been stretched onto frames. Foils 02,03 first measurements were made ~ 1 day after stretching. This may explain the initial fast relaxation seen on 02,03 but not 00,01. Robert