BP SD click
Been watching this post, with great interest. The BP click is an absolute nightmare, it is nothing like gen in either feel or sound. If you fit the generic click it will be little or no better.
The stock click is fixed in a hole under the bezel ass'y at approximately the 1.O'clock position, it extends counterclockwise down to the 8 O'clock position, making it approximately 30mm long. Gen or generic are about 8 mm long.
Very strange you may think, why so long?. It's a long story (pardon the pun) so I'll cut it short, the bezel running ring is not made to the same finish or tolerances as gen. If you inspect the bezel running ring you will see severe burrs and poor surface finish,
If you want to get the click something like gen, spend most if your time finishing the running ring to a better standard. Remove the BP click and modify a generic, to get a generic working something like, thin it down, so that means reduce the wire diameter.