Can I suggest that you find out what spanners fit the bolts on the adjustable/ removable side of the yoke and hang them up on the beam above the yoke along with a hammer. If a cow goes down you might need them in a hurry. Probably 2 x 17mm but some of those yokes use 16mm headed bolts.
Noted that I’ll find a couple of old spanner’s out just for that.
this yoke has a quick removable pin to at the bottom for such instances.
if you look at the floor there’s a small kerb/step which was causing a little concern as it is, but then I remembered I have a load of stable floor matting which I can lay on the floor over the kerb. Should make for a better job no sharp corners softer landing calf etc.