I have a probably 30-40 year old Craftsman 358. It belonged to my Grandpa and he used it to trim his giant live oak tree. Think 70 year old climbing around a tree with a 60 foot canopy every couple years. He didn't do firewood and had no other trees to really take care of. It has been sitting in it's case since then. It was probably last used in 2007. I'd like to get it back to running, to keep as a backup saw. I've done basic maintenance on my saws, but I haven't done anything past that. Besides swapping in a new plug, air filter and general cleaning, anything I should watch for on it? I'm guessing rubber or plastic parts could've deteriorated over the years?