I’ve had one issue after another since the upgrade but, so far, not with tension. I’ve replaced the bobbin case, faceplate and foot pedal on my own because I tired of carting that heavy machine to the dealer. The bobbin notification doesn’t work so I have to keep an eye on how much thread I have. The buttons now stick. When I push the backup button, I don’t know if it’s going to keep backing up or going forward. The pressor foot also sticks. The stitches skip arbitrarily which has nothing to do with the needle. My mom was absolutely right when she said ‘the more things on a machine, the more there are to go wrong’.