Is anyone running the newest firmware from Bitman ? I keep playing around with Voltage and Frequency settings but my hash rate spikes to over 500  for a couple of hours but then drops below 400 ?? why ?? my temps are 38 to 40 ?? I also cant edit my /usr/lib/lua/luci/model/cbi/cgminer/cgminer.lua (Permission denied ) file for frequencies higher than 250 ? Any Ideas ?