I have neither but just wondering before I commit. The classic 3 wire measure 3-48 TPI & cost about the same as the 2 triangle system. The triangles measure 4-80 TPI and maybe one less item to drop on the floor Catalog says includes a chart for all standard & special threads, hopefully that means metric too. To my amateur eye the rubber harness things look a bit iffy & why do the anvils have to be so long? Any other pro's & cons I should be aware of?