I agree with you about Rubi tools, they are not the best. I can give a hint, that Sigma also makes tools for real professionals, if there are any available. Not very cheap, of course.
And one more question: how do you cut the mosaic pieces (glass), if you need to do it a lot? Maybe there are some tricks (or a tool), I don`t know yet...Takes pretty much time to do it piece by piece
