Thx!!
No fan yet.. I have the material, but there is not that much space for it. (I have a big head!
) But I will have to put it in there, or else I will die of dehydration after 20 minutes...
Voice amp, yes! You see the cord from the mic in the picture on the side of the helmet. I found a very nice set for 37$. The speaker is a bit big, but I'm planning of placing it in the jet pack. (It's powerful enough)