Thanks for all the comments!! Rex Spex on order (they are back ordered) I have to play with the tie down points, 2 different Bull Terriers, Pig, the pictured is a small 13 yr that will just ride around the neighborhood, the male, Bob, is a full size, 60lb bully and will need a different set up and he would be more prone to jump out. Pig just digs the breeze. I set up a D ring under the seat, threaded it up behind the seat, got to get another strap for the front but she has to sit on seat as she is small. Bob will need the seat removed and I like your idea Snakeoil of a center teather.
Side note, you can tell someones age by what they remember the Bull Terriers by. Us older folks think G.S . Patton, or Black Sheep Squadron (TV Series) a little younger, Spuds, younger still Chico from Movie "Next Friday" As if the Ural does not get enough looks, throw a Bull Terrier in there and the stare ratio goes way up LOL! Thanks again guys!