Today's build is working great so far Sandor. Initially it hung immediately and the previous build wouldn't then work either as if the gridseeds had frozen up. I power cycled the gridseeds and the new build worked first time. So, probably just me. Not an issue.

FWIW, after 40mins (ghash.io multi pool, 16 diff):
GSD 0: | 870 MHz | 349.7/368.2 KH/s | A: 872 R: 20 H: 2
GSD 1: | 850 MHz | 323.4/360.0 KH/s | A: 809 R: 16 H: 0
(2.14% rejects)

2nd build of today, after 2 ~9 hours (ghash.io multi pool, 16-32 diff):
GSD 0: | 870 MHz | 367.0/368.1 KH/s | A: 8485 R: 59 H: 25
GSD 1: | 850 MHz | 350.3/359.9 KH/s | A: 8151 R: 40 H: 18
(0.60% rejects ..some caused by me switching wifi connections!)