To the master's of this thread, I would like to revisit a few questions if anyone is willing to answer.  When it comes to modding straps with all the options of settings that can be changed, is their a guide to what values can be adjusted.  I went back and looked at a few mod bios I have received over the last couple months, different cards and different mem types to better understand what was changed and why. 

My biggest issue with understanding is do you guys who have the knowledge to manually change mem straps use a guide tool or has it been purely trial and error over the last few years? 

Not asking anyone to give away secret sauce, just want to know if I am wasting my time looking for helpful guides or just start shooting in the dark!