Hi, I have a hydraulic issue with my 360 Spider and while I sort that out I need to get the soft top closed. I read the manual and have found the socket to perform a 'top emergency closure'. I think it's a tool supplied in the tool kit which unforunately didn't come with my car. The part number is 663063000 - Key for Top Emergency. It looks like a regular square ended tool similar to an allen key, could anyone tell me which diameter it is and i'll buy from a local hardware store? Thanks!