Szczepan is largely correct. But I am really quite suprised that he didn't also advise you to forget iaido as a means to anything other than drawing the sword out of the scabbard.
As Sugano Sensei once said when asked about aikido and sword "if you want mochi, go to the mochi maker."
I have no idea what he wants to develop with sword cutting. I believe he didn't say a word about it?
Concerning Sugano Sensei, he practiced some time western fencing as well as meditation. It means to me that mochi can be found in some very unexpected places