PUBLIC MARKS with tags sword & aikiken

I've become obsessed with my sword cuts as of late. One thing has been driving me nuts for well over a year. When I swing my sword, watching my cuts in a mirror, I just can't seem to get the tip of the sword to go straight. It moves, ever so slightly, side to side as it goes down. It's super minor, but I can't stop thinking about it, which is probably making it worse! What I tend to do is stare at my own eyes in the mirror and try and swing the sword to pass between my eyes in the mirror. I think I'd equate it to shooting a rifle or a bow and arrow and having the shakes. Has anyone else experienced this and been able to steady yourself?

The always recurring theme of Aikiken has given one of the most complete advice in an internet forum in AikiWeb. Quoted here:

Aikibatto is a system of sword exercises, both Aikiken style bokken with partner and iaido style solo training with iaito or shinken, for learning how to handle the sword in an aiki way.