Headblade has some good instructional videos (I saw demonstrated how to change the ATX blade, which was very helpful). There are, in the cluster of videos, a Headblade ATX commercial (says it can be used "everywhere") and some how-to demonstrations. Very useful for various purposes.
http://www.headblade.com/Videos.html
Thanks Earl!

Have to check them out at home (no sound here) - maybe they have some tips. I have not gotten a really good shave from the ATX or the HB4.
Someone gave me a HB3 for Xmas too lol