SP, regarding the spreadminer, in general it works great (9MH/s for 1070), I appreciate it!
But I find out that it does not perform any GPU errors checks. When I tuned OC, spreadminer displayed good hashrates, but did not mine anything for a day. Then I ran ETH miner and it immediately complained about GPU errors so I was able to find better combination for OC. Today soon after finding yet another spreadcoin block, it started to display crazy hash rates and I had to restart it manually. It would be really, really great to get automatic diagnostic for it and restart the miner automatically. So far I see no way to do it.

Thanks again for you great work.