Maybe you should try the CPU miner for Gridseed from sandor111, I always had the best results with that.
https://github.com/siklon/cpuminer-gc3355
You should get something like 5.6Mh/s with it. HW errors should be only a few.
It also shows the results from each chip, so you can easily track if there are chips doing nothing at all.
Thanks for the tip, I will try it for a few hours and see if i have better results
