I am running 4, 2pacs on NiceHash with your Windows build. My NiceHash reports say I am running at low efficiency as I am not using the #xnsub (extranonce.subscription ). I have tried adding #xnsub in the command, but it flags a URL error.  My question is, have you incorporated the NiceHash include file for extranonce in your cgminer for windows builds?  Thanks for all your support!