Never used a 1 pass tool that does a decent job tbh if you have to go up and back over what you’ve already done it’s not a good tool,I love the wagtails but I’ve always found the standard flipper to be the best they’ve ever done.
With the flipper he hit the nail on the head so to speak it’s a great tool,almost all of the other inventions he’s come up with are painful to watch. The flipper- swivel -applicator and pole attachment are superb that’s where it ends.