I just got this 10" South Bend. I am new to these and I have heard the term "Heavy 10"? Is that what I got? the serial number is LT-106R 4512RKT9. I am picking up the original base tomorrow. It is missing a LOT of the gears but at the price of free I had to take it. I hope gears are not to expensive. Can you guys tell me about how old it is? Thanks