For as long as I've been playing you would think I'd know something about setting up a bass...but I know very little. I barely even know what the parts are aside from the bridge, pickups...that basic stuff. Anyways, I want to adjust the action on a couple of my basses. Is at is simple as getting the alan wrench out and lowering the liddle saddles the strings sit on in the bridge? Will this cause my intonation to go haywire..particularly on my fretless? Thanks.