I want to buy a spare bar for my new 359 on ebay. My current bar lists serial numbers that include 3/8 72dl and I know the slot is .050. On the factory Husky bars these same dimensions are listed on HA-380-72 and HT-380-72 and even FT-280-72 for the 20" bar. I would like to know are these for different model saws and have different mounting holes or are they for different chains or are they the same with different noses. Is there a site I can find out the compatibility of factory bars for models and chains. It looks like I could get a factory bar for a lot less on ebay with a little patience but I dont want to get stuck with the wrong one. Any info that would point me in the right direction would be greatly appreciated!