1*Why not just clamp one of the blades you have to your FEL bucket?
It's quicker simpler and easier than taking the bucket and blade off and putting them back on.
2*I do to. But I'm not going to try cobbling one of them up to fit the FEL on the bx23.
If I need a blade I'll just use the Bolens or The Cub Cadet with the blade already on it.
3*One is on my 1966 Bolens 850 tractor.
4*The other one is on my new CC 2554 .
Guess I've done it a little different than you:
Instead of trying to put the Blade on the tractor - I've already put the tractor on the blade