Forgive me if this is a stupid question that should have been a no-brainer to figure out. Has anybody have any idea how I can figure out what size sausage tube will fit a BBday cheapo grinder/ stuffer? There is no markings on the machine, the funnel that came with it, or any of the grinding plates. I tried Google for a customer service number and discovered that it always refers the customer back to customer service of the store it was purchased at.