"Thanks for the photos. How safely can we mix and match these mods? Right now I don't have an iron tip fine enough to do the soldering mods. I either need to modify something or order something. I am interested in the pencil mod and the fan mod tonight though. Would this be safe? "
No, I don't believe the pencil mod will do any good without the other 3 mods.
Pencil mod is to adjust PLL voltage which needs to be corrected due to the offset caused by the two solder jumpers and the resistor is a timing adjustment to smooth out clock transitions at higher frequencies I believe.
You can make the 5V fan mod any time but remember, it's recommended for Scrypt only operation.
It has not been tested in SHA or SHA / Scrypt mining mode!
As usual, do these mods at your own risk!
Wolfey2014
Wolfey,
Somewhere in this thread is mention of a cgminer version that allows you to set the voltage. I realize you're using cpuminer, but do you think all 4 mods are required if we used the voltage mod cgminer? Value your opinion.