Thanks, Charles, that makes perfect sense, now I finally understand, it just seemed to me a rather dangerous prospect to have an open cab...... I get it now... I have a good buddy who is a firefighter in Calgary Alberta, and he said he used to ride in the open back of a Ford C cab, in winter he said it was BLAH_BLAH_BLAH_BLAH cold ! Again sorry for any highjack, this is all very interesting............. Thanks again, I will now go back to my seat and watch quietly... Jeff