Paying about $.11 here. I never got the expected decred from the dual miner, and there were always a fair amount of rejected shares too. Because decred uses the GPU memory it gets REALLY hot and the power draw for me was at times 25% more than just mining ETH. Not worth killing the cards for a few dollars more especially when it didn't even look like the estimates were on target.Yeah this is my fear too. Also what are you paying for electricity?
Remember every minute of downtime is lost revenue and this scales proportionally the more Mh you are mining at. I haven't done the math but if it takes me roughly two-three days to tweak 9 miners is that worth switching over given the amount of downtime necessary to dial in the proper settings using Claymore? If on average I generate 2-3% more per miner how long would that take to even break even with the downtime. Also factor in the difficulty curve during dowtime and added power costs etc.
Here's a pic of decred mining heat generation: http://www.cryptomining-*********/7501-nvidia-geforce-gtx-970-thermal-images-for-ethererum-and-decred-mining/