GV will probably see declining margins after CREZ, but as for the replacement business, I'll trust the CEO rather than the short seller. They have lots of growth potential since they're such a small company, but the competition will be tough. At this point it's hard to predict where they'll be a year from now. I could see the stock retreating to $4 in the coming weeks, but not much below that unless some bad new develops.
I have just a tiny <1% position left in the stock purchased a year ago at under a buck. My mistake was selling most of my shares much too early.