I did the firmware update yesterday evening. I've just done another session and my carry distances are down around 10%. This is frustrating as they were very close to accurate before.
Please feel free to log into my account and review the session from 13th September and 14th September. The 8i shots show the difference clearly.
Session carried out from exact same set up. 7ft unit to hitting area - 12ft hitting area to net. R10 aligned and level checked by spirit level both left to right and back to front.
Really unhappy with this development - would roll back to 3.4 in a heartbeat if I could. Spin still around 2,000 lower than expected on iron shots but this has been constant.