I'm also totally in love with my F**K... I thought I liked my Klon- type OD... the F**K adds such an amazing bite and crispiness and shimmery-ness to my sound. I dumped my Klon within a week of getting a F**K.
I've had an idea for an effect... a parametric EQ/Distortion circuit with independent controls over amount of fuzz/distortion/OD you throw on the low freqs, the mid freqs, and the high freqs... you can choose to maintain the integrity of the highs while you distort the lows, or distort the high freqs and keep your lows clean-ish.... or just distort your mids and keep your highs and lows shimmery and deep. Blend controls for each freq band, parametric choice of where the band cut-offs are, being able to change the character of the distortion via different diode/transistor combinations...
I'm just gonna read up and figure out how to do this on my own.. what the hell