Well, you can still guide Beau, but like April already pointed at, you can do that without at the same time putting unconsciously demanding it.
So if Beau now is cordeo-shy, then the cordeo is a great exercise in itself!
At one point in his life he was taught that he could carry a saddle, carry a human, step over a jump, walk through water, wear a blanket - and still stay alive and reasonable,
so now it might be time to ask something more advanced: wear a cordeo and stay alive and reasonable.
As long as you see 'wearing the cordeo' just as another fun exercise, a great trick you two can do together, I think he will get used to and love wearing the cordeo very soon. And then you can sometimes touch it in order to ask something - but only when he first has learned that the cordeo isn't a horse-eating contraption that is developed in order to kill all the fun in a trainnig. Just play with it and make it fun so that he really starts enjoy seeing the cordeo. Chase the Cordeo, Retrieve the Cordeo, stand pretty when the cordeo is around your neck, get foodrewards when you carry the cordeo in halt, all those very, very challenging exercises and a lot more.