> I am also contemplating tinting the Syncro's windows so the same
> question applies; would his jumping around damage the tinting?

My spastic mutt is ~35lb, so bigger than your Jack, but her nails have
yet to mark the tinting on the windows.

toodle pip,
--
        Dug Smith         | Terry Pratchett: It's almost
(mailto:dug@dugbert.com) | impossible to ride a rock and roll
(http://www.dugbert.com) | motorbike and stay on for three verses.