Ultimate shoulder rides

The first one is just great: http://www.fetish-film.ch/Deutsch/Gallery_Trailers/ … _riding_1.wmv  Just a trailer, but I got the full version years ago and there are parts where the guy is actually spurred to trot and you can see the rider's weight sinking into his shoulders at every step.

What type of saddle do you think that is? Looks very effective on the guy's shoulders. If it's a normal pony saddle, I wonder how it's fastened on the shoulders...

Second clip: http://www.fetish-film.ch/Deutsch/Gallery_Trailers/ … _riding_1.wmv 

Third: http://www.fetish-film.ch/Deutsch/Gallery_Trailers/ … _riding_1.wmv 

The main thing I would change if I were the director of these clips: the slave's arms should be fastened or handcuffed behind his back, to make the abdomen clear for the lady to use the spurs!