IN case it helps any one else :
linebaugh is said to screw his down and solver solder the front sight down. Clements uses a mounting post fitted into a drillled recess in the ramp, machines the ramp to fit the contours of hte barrel and then silver solders the ramps front and rear for about 1/8"x 1/4". if the weld of the silver solder is broken it appears to e a porous material..
if the sight is knocked off, the silver soldering has to be repeated and the finish on the barrel is damaged such that it must be re blued.
Also it is worthy of note that Mr. Clements offered to repair the front sight free and blue it for free and for me to only cover the shipping, I am the third owner of the revolver and could not believe it.
I plan on making him accept something in return, as it was not his fault by any means.
what a man !!
Hope this helps someone doing a search or having the same question.. evidently sights can come off... silver solder welds can be broken.
and Gentleman craftsman do exist and survive in this hard deal at your own risk caveat emptor world.
dan Kennison