Dave,
Which one of the gold-bead front sight sizes are you going to get? Will it be the .300 size gold-bead front sight, or the smaller size gold-bead front sight from that link? Both look like they are made for the Smith and Wesson DX style sight base?
I have a LARGE McGivern gold bead on the front sight of my 500 S&W. Heavy recoil forces do not permit a traditional DX interchangeable system on mine. I am told the spring, under intense recoil impulse, will compress and the sight will fly off. Seems the screw modification to replace the plunger would allow it to stay though.
Freedom Arms uses a screw put in from the front of the front sight base with a tapered point to sink into a angled cut in the front of the sight blade. With a liquid fixative of some strength it might also help hold the screw and keep it tight. Still, that sight I bought after-market from Brownell's that is pinned in is a good one, so I may never try to get a DX set-up for it.