As an aside to this , how do you value anything and tell the insurance, if I added something to our van I wouldn't have dreamed of telling the insurance about it as I would assume it's added nothing to the value that someone else would pay, and write it off as hard luck if something happened to it, similar if you go and load up with a grands worth of booze you wouldn't dream of telling the insurance, even though you have added value, well nearly doubled its value in our case. 
