The E3 is out of the box compatible - it takes ~5minutes for it to load the DAG file - it's absurd but it works
leave the password field blank


./ethdcrminer64 -epool etc-speedpool.com:8001 -ewal YOUR_ETC_ADDRESS -epsw x -eworker RIG_ID -esm 0 -mode 1 -allcoins 1

We change lowest fees 0.1%  and pay more then what crypto calculator calculates.
 My pool is European.

thanks ,

https://etc-speedpool.com