That is really odd that the dipsey on 1 setting caught so well and both 3 settings caught nothing.That happened to us last season too,except it was my 3 setting catching and my 1setting nothing.Like you,changed leads,lures and colors to no avail.Was contemplating changing the dipseys to a 3.5 and 2 setting but didn't try that option.Ended up getting skunked on those pair of rods.Humbling to not get a pair of rods to catch something after hours in the water.