okay so the Martelli seems to be the most spoken about cutter on here, now one more ? Whicj size do you prefer? The 45 or 60mm?

45mm -- I own smaller blades (other brands) but have never felt the need for a 60 mm blade. - I should say that i've easily cut 8 layers of fabric with my martelli 45 mm cutter -- I don't know if I could do that with other blades. I can't see the need to cut more that 8 layers, so I don't see why I would need a bigger blade.