Flipping the wheel works so well for me that I've never bothered with a dishing tool. I've built/rebuilt 7 sets of wheels so far this year alone and use the flip method. Wheels have been everything from tandem wheels with basic shimano hubs and rhino lite rims to King and White Industries hubs and 140.00 rims. I worked in a shop for several years building dozens of wheels each year and a light touch with a truing stand really does work. Key is to loosen the wheel lightly drop it back into the stand and only slightly snug it, loosen, pull out the wheel without touching and again lightly drop in and only slightly snug. Movement too or from the feelers is the measure as I'm sure you know but it can get incredibly accurate with a very light touch and if you happen to be off by less then .5mm no one will ever be able to tell or know. I've seen factory builds off my 4-5mm that people had no clue of when doing tune ups and riding for years. Its an appalling amount to be off by but the flipping method can get you as close as any dishing tool.