Honing by hand is a crap shoot for me so I bought the 123. Keep in mind that I have the T4. The 123 works good with the sharpening wheel but not the honing wheel. The threaded rod gets in the way when using regular size paring knives. The 123 worked on the honing wheel when I tried a 2 inch wide chef knife.
The bigger machines are wider and the threaded rod doesn't present this problem for them.
The bigger machines are wider and the threaded rod doesn't present this problem for them.