What is the recommended setup for antminer S4.
I readed on dogie review a issue with firmware and vardiff.

miners have :
Hardware Version   3.4.3.0
Kernel Version   Linux 3.8.13 #12 SMP Mon Sep 29 11:13:50 CST 2014
File System Version   Fri Oct 3 18:17:17 CST 2014
Cgminer Version   4.6.1