RCU Forums - REDBULL Edge 540 build 71inch w/s

Hi all I'm quite new to rc plane's and this was my first ARF build and i have chosen to go straight to a gasser.. I bought an edge 540 71inch w/s from an auction and it was missing the instruction manual/DVD so I only had the picture on the box to go off and a tiny bit of rc building experience.... The box said 26cc/30cc so I put an MLD 28cc cause I found a template floating around in the box.... anyways I don't know the make of the model and can't find a picture online ...I need to know how to find the CG and is it on the wing tip/root/right side up/or upside down?? PLEASE HELP!!!☺ And can u upload pictures on hear? Hopefully someone will know what I have? Cheers fella ' s.