The last problem could be that it's missing an air intake. If you look under the second pilot where the cannon should be placed there is something that looks like air intake.
So far:
http://www.canit.se/~griffon/aviation/text/suit/tfcs.html
Some testin is carried out with the new Guardian Helmet-Mounted Display.
http://www.sae.org/aeromag/techupdate/04-2001/tech3.htm