I've been doing leather work several years now and getting better with each new project. I have a question I need help with. I have only used Ritza Tiger thread in 0.6mm, 0.8mm, and 1.0mm. I'm always using 3.0mm, 3.38mm, 3.85mm, and 4.0mm stitching irons. I do alot of gun holsters, knife sheaths of all sizes, pouches, etc. I just have no idea what thread I should try next, Ritza Tiger thread is all I know and I like the 3 sizes of Ritza I use so if I try a different thread, what sizes correlate to the 0.6mm, 0.8mm , and 1.0mm and what is a good thread to try for holsters, sheaths, pouches, etc.