Does anybody has a pattern or the measures (thickness, length, width) for make a leather strop? What kind of leather is better for a leather strop, horsehide or cowhide? Do I must to use the same kind of leather for make a hanging leather strop than for a hand held leather strop? Do I must to apply any dye or finish to the leather? Does a leather strop needs any upkeep, any cream or similar? Thanks for your answers.