I can't find the link where I found this hook knife hack, but here's what I did to my 164 to make it much more usable.
Essentially you have to knock off the "Scandi" blade shape edge and make it a flat grind or at least more convex. (I'm not talking the edge geometry, but rather the blade geometry.)
For that I fired up the Harbor Freight 1x30 grinder. (The absolutely most used cheapest tool that absolutely has performed.)
Then I knocked the bump off the back of the blade very carefully trying not to touch the sharp edge.
After that I took 1000 grit auto sandpaper and glued it to a wooden dowel rod as you can see here:
I touch it up with that, but will probably soon make one with some 2000 or maybe even that 3/M sponge backed 4K? paper. (Look in the automotive section at Walmart and they usually have a selection near the bondo and dent repair stuff)
The guy I got the idea from (may have been a you tube) did it with a stone.