OK, so they are tough and strong. But why in the heck would you, or anyone else for that matter want to do that to any machine? Sounds like a big case for anger management therapy.
Anastasia,
My 158-17570 will easily sew over 7 layers [b]if[/i] they are flat. But throw a fold in the seven and it has problems.
There is a limit to what a Kenmore will do.
Joe