Well the good news is that I have more than enough for what you need.
The bad news is that I don't know whether I can easily remove the strengtheners and what not from the underside which means the easiest option is to cut a big whole slap in the centre of the bodycut (i.e. between the struts).
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thanks mate, its much appreciated
if it makes it easier for you, you could just chop the sides of the strengtheners off and leave a flat strip of it left to the floor. I can chop the rest off and tidy it up no problems......or failing that cutting between struts sounds do-able