hey, I'm currently using 3/0's and I was wondering if there was anything smaller? I know these are pretty small anyway and they work well for what I'm doing at the moment, to the naked eye its good work but if I put my work under an optivisor or look through a loupe at it then I can see the difference, which makes me want to file or saw closer to the outline of the object im working on, any advice on smaller fineline blades????? T.I.A