I might recommend Gum Ka for a good Zimmerit tool. I believe it is a Japanese company. Frequently available on eBay, but also Japanese retailers like HobbyLink Japan and RainbowTen. The Zim tool is supposedly more accurately scaled and versatile than Tamiya's. The company makes decent photoetch, and was the first company to produce engine screens for Dragon's 3 in 1 1/35 Initial Tiger I. Good luck!