[The Cajun]

That sharpening jig you are showing is also sold at Lowes, NAPA and even Sears.
Best thing since sliced bread.
It, proper size file for your particular chain and proper depth set gauge are all you need.
Takes about 15 minutes on my 28" Homelite Super XL (Last good chainsaw Homelite made).
Own 4 chain saws, 28", 18", 12" and a 10" pole saw, works great on all.
When you start seeing sawdust instead of chunks of wood flying, time to sharpen.
Been using chain saws since I was 13 and now 66 years old.

[woodbutcher1963]

I actually bought my jig from Baileys Logging Supply. I could not find it on their website when I did a search.
Baileys is where I buy most of my tree cutting supplies.
I have had a Stihl 026 for twenty years. I have replaced the bar twice, air filter once. I think my automatic oiler may need to be replaced. It seems to get plugged up easy now.