We recently bought a very nice used CB 3200 a few months ago and when we first got it, it was sewing everything, thick and thin with almost no adjustment. Recently the tension has gotten out of whack and the top tension appears to be too tight, while the bottom tension is too loose. Despite having every point loosened up top and the bobbin tension being tightened. Attaching a picture of the problem. Does anyone have any ideas to remedy this problem? We are normally sewing on lighter leathers.