Ooh, interesting. I was planning on upgrading by GT3 to the GT3B, but I may just have to wait

. Not sure if I like the designs as much as the previous generations, though, but I'll be interested to see what new functionality the GT3C provides over the GT3B, and more importantly what the GT4 will be able to do with another channel. Mixing, perhaps? or dig for crawling? Guess we'll just have to wait and see
EDIT: Specs say the GT3C and GT4 run off 3.7VDC. 1S LiPo? I think YES!