I have a 16 inch bar on my 029 and would like to get either an 18 or 20 inch. I would prefer the 20 but am not sure if it will handle it. I have a 20 inch for my Johnered, but that is a little big for that saw. Any thoughts? Also, should I get a stihl bar or an Oregon? I think I can get an Oregon bar and chain from Lowes otherwise it's a stihl from the dealer and they can be a little pricey.