IMO the right value of resistor (or any passive component) is more important than its tolerance (and its extra capabillities) and paying mouser (or any other specialist e shop out of my city) something like 0.7 euro per resistor (+ shipping) for a cheapo pedal thingy is not for me. I know it will sound "better" than most behringers or mooers etc (and it will cost less) anyways.If not 1% then what - 5% ? 1% tolerance Metal Film is inexpensive now and basically the standard thing for non-precision commercial application.
If I find 10 for 1 euro (or something normal) of course the best tolerance make my BOM.
But anyways...resistors tolerances is not a debate I would enter and precision maybe "ideal" but not something I give a lot of thought.
Music and sound is absolutely subjective.
But just to put things back in order thanks for your posts Newmarket. I do appreciate your input, knowledge and advice.