Tarty gave me a knurled DX32 to test. It looked promising, very rough, constant surface. Unfortunately it didn't work to the same standard as a grind using my proven home made pads. Wore the pads out much faster than usual, and it had nowhere as near as much hold as a grind. Shame really! I did make a mistake though... built the rim up just before Koxx days and didn't ride any street on it whatsoever. Should've tested it on somewhere less extreme as Buthiers! It kinda performed like a smooth rim. No loud squeaking when dragging the brake, plenty of modulation but a serious lack of hold! When you dragged the brake it sounded weird, like a zip being zipped up fast lol.