Sansamp INTERESTING IDEA! HELP EXPERTS!

[askwho69]

Good Day! a pleasant day to all! i have an "IDEA" i've made SANSAMP from tonepad layout, at first it work awful very thin and the mic sounds like hallow why? because i tried to swap the value 6k2 resistor to 6.8k because its not available and i thought that it will be okay . . . but when  i tried the 6.2k = 4.7k+1.5k series and it works AWESOME my recommendation never swap the 6.2k to 6.8k in sansamp because it really matters.. by the way my crazy idea is really this " i like the clean "tweed" mode of sansamp and want to make it as a bypass.. example my dirt is California then if i turn the switch "bypass switch" it goes automatically to tweed mode.. is this possible? if yes? how can i wire it up and what sort of things do i need? i really appreciate if someone might help me thanks!