OK I think I found it on their site - missed it earlier...

Looks like I should be using a 3/16" file in the file guide for either the Oregon 95xx or 20xx chains.

http://www.oregonchain.com/pdf/accessories/FilesAndSharpeningTools.pdf

That is the best size for that chain. Now all you have to do is practice practice practice. Follow the suggestions on their site.

I dug around and discovered I happen to have a 5/32" Oregon chainsaw file/guide set. How bad/good would it be to use that?

If not - could I replace just the file? or do I need a different guide for the 5/16 for this application? (I think 5/32 is stamped on the guide is why I ask)

thanks

Just put a 3/16 file in the guide.