A silly question - but how on earth do you get the fixed and sliding perspex screens out of their extrusion channel to replace them? I've found a very helpful local perspex company that can make replacements (including replacing the handle pulls in exactly the same way) but i've pulled, bent and heated with a hair dryer and still no luck. I feel any more bending and pulling and they will crack (and i want them intact to use as a template). I have a 2010 4/4 - any advice gratefully accepted!
