New to sewing and if there is a thread on this already i apologize. I looked but didn't see one. I just bought a used Ferdco Pro 2000 and was going to run through a "get to know the machine piece". It is balling up the thread on the bottom and stopping the leather from advancing. I am sure, no hoping it is something simple like an adjustment. The sticker on the thread says Amann Group V1015-4000 Strongbond 10 1500M, The needle is a #180. Please help.