I have two SD40212S-HN on a site with the identical 2013-11-13 FW to tomas21. All the vertical presets on one of them periodically becomes corrupted, dropping down by around 45 degrees. I was thinking about replacing the 80 metres of Ubiquity tough
cat5 to it but but now would first prefer to update the FW. So, it's either nayr's version or tomas21's but having clicked on tomas21's Dahuawiki site link am not clever enough to know which to choose. Also, will a FW update work OK over slow broadband if there are a few errored packets without disastrous results? Any help please?