Well I'm vurry interested, that's for sure! Daft question: what exactly does the Tight button do? (or rather, what is it doing, technically?)
I think the complaint that X's tone is in their fingers, strings, basses etc. is moot. You could make a Jaco pedal that accurately captures the noise he generally made and you'd get loads of complaints about how you can't distil his genius. Why buy anything endorsed by/designed with/recreating the tone of, anyone if it can't be done?
/2cents