I recently stumbled over a video of an Singer 133K sewing machine and I mediately fell in love with it But I can´t find much information. What I like to know is : Which sub class has the walking foot. (I know it has not triple feed as it lacks the needle feed as far as I know). I assume it is the 133K8 + K9 but maybe there are other sub classes with walking foot. How high is the foot lift and how thick can these machines sew? I don´t want to sew leather but heavy webbing.