Hehe, I can see how that would be a problem from lifting the shinai up above the head. Yeah, kiai is totally badass when done right. I need to learn how to do it properly (as well as everything else). Sounds good, and maybe Reks and Jin will join us. HC Kendo Club ftw.
Dew eet! Your skill with the shovel can only increase. I actually find it similar to playing an instrument, with the extreme concentration, form/technique, and just plain practicing with a mirror a lot, needed to learn quickly.
Funny stuff. Someone should ask you what model it is in hopes to get one for him/herself.