Replacing Autosleeper Symbol sliding window

I need to remove the sliding perspex habitation window from the driver's side of my 2005 Symbol in order to send it to ECCO windows in Halifax for a replacement. Has anyone any experience of doing this that they care to share? I am assuming I need to remove the 'U'-shaped rubber strip that it runs in from the frame, but I would be grateful for confirmation of this and any tips/advice before proceeding. Many thanks. (The original window was made by Para Presse).

I've not had the experience, but have you spotted this other thread which may help you out?

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No, I hadn't seen this, but did manage to remove it after phoning Autosleeper for advice. Many thanks anyway.