Peter, please correct me if I'm "off-base" on this, but when it comes to the ukulele, I have found that if the action is set "crazy low" at the bridge/saddle, that can noticeably diminish the volume and tone of the instrument. So, I usually ask the person doing the setup to go for a "medium-to-medium-low" action (I realize that's pretty vague!); and if I decide it needs to be lower after a few weeks of playing, I can always take it back for further downward adjustment.