Thanks, the truth is I don't know that much about the thickness of leather, but it is something similar to the thickness of vinyl, but in leather, obviously I won't sew tanned leather or anything similar, and for the thread I normally use something like t70 but that would be wrong start using a slightly thicker thread thickness, this will be my first machine with a cylindrical arm, my budget is a little small and my intention with this head is to make it a bit “all terrain for medium thickness leathers”, what do you guys think?