My Pfaff is about 10 years old and it did the tension fit too. I tried everything, even read the instructions! Nothing helped so it went to the shop. It took a new bobbin assembly and it cost a bunch but it works like a new one now! Worth the cost. I always warn the dealer when I buy a new machine that I will sew anything I can get under the foot and if that machine can't handle it they will be seeing a mad Irish woman at their door. Several have been honest enough to tell me I didn't want their machines. HA! This Pfaff has been a dandy, a real workhorse and really worth the cost.