I personally will just pay a shop (usually $20-25) with a good, accurate edge machine like a Wintersteiger TrimJet to do 88° and 1° angles and then maintain that with multiple diamond stones and the correct bevel guides through the season(s).
While you can get really sharp edges with hand files and diamond stones, I believe the difference you feel between a shop done edge and a hand filed edge is the burr angle/direction and consistency of the edge sharpness. Think (generally) of how you sharpen a chisel or knife (with whetstone). You don't sharpen those by filing parallel along with the length of the edge (hand files/guides). A machine with a ceramic disc will throw burr angle/direction of the arc nearly perpendicular all along the length of the edge. Not sure I explained my thoughts correctly... Just my 2 cents.
While you can get really sharp edges with hand files and diamond stones, I believe the difference you feel between a shop done edge and a hand filed edge is the burr angle/direction and consistency of the edge sharpness. Think (generally) of how you sharpen a chisel or knife (with whetstone). You don't sharpen those by filing parallel along with the length of the edge (hand files/guides). A machine with a ceramic disc will throw burr angle/direction of the arc nearly perpendicular all along the length of the edge. Not sure I explained my thoughts correctly... Just my 2 cents.