i was about to say the same thing. my iai instructor was watching me and said to try cutting with the left hand and let the right hand just go for the ride. then slowly start to bring the right hand back into play
nice post ash
Glad to see someone finds something I post valuable every now and again.
I'm usually the one asking the questions or offering what is probably horrid advice.
Also, you could try standing in front of something that has vertical lines. Find a doorway or an edge of a window. Then try to cut straight down that line. You can easily see if you are off or not and you aren't focused on your sword, but what is beyond the sword. Sensei has us do that in the dojo to gauge how straight our cuts are. Seems to work because your looking further off into the distance.