Charge Scissor

I've been using my Scissor off road for the past couple of weeks and it's ace... I normally use it just to rag around, not so much a 'trick' bike but just something to ride hard.

pics courtesy of Jenny Hill Photography (Julip.org)[URL="http://www.lfgss.com/julip.org"][/URL]

What size frame is this? I'm struggling finding out what size frame to buy for a fgfs frame. I want the back dropped as it looks in this picture and using it like that I.e. no tricks,just commuting...any help In frames and sizes would be appreciated. I was after a Gangsta,but they are too expensive,trying to pick a second hand one and repaint.
Cheers