the old PFAFF

i've pulled out my original and very fragile 1950's PFAFF instruction booklet, oiled + greased every part, looked in every cranny, polished and dusted... but the old german gal still "sticks" at a certain point of rotation. she weighs a ton and i hope a trip to the sewing machine doctor is not necessary. fingers crossed i can keep tinkering and fix the problem myself... soon! wünscht mir glück!