For your info, guys. It uses a sarantel antena. If you could dismantle that bug casing it will reveal the antena. Hope it has a radom black covering so that you can place on top of LCD. If it has only a plastic for internal let me know I have still spare radom black covering for sarantel. And yes! you can replace by a longer coax.
Teo , have you put one of these in the top before because there is no room unless you do some cutting . It can't go inside / back of the LCD because it will not get a signal if I am right. The antenna seams to be a little big
Blair! for the last three years I've abondoned on using that antena on CF-18. If you use that on top of LCD, It require a lot work and not worth it, coz it is to fragile. As of to date I use the taoglas antena, the 25dB with size of only 10mm X 10mm X 6mm which is perfect on CF-18/19 on top or the side plastic covering. The sarantel antena that you have will be perfect for GD Xr-1 if that is the sarantel S active antena or even on CF-28 and CF-29 but again. It needs a lot of work. Let em know how I can help.