I'm in the exact same boat! Although I'm happy with the rear site , which I swear is the Williams WGOS series ( I called Williams but the guy I spoke with didn't know, maybe it is since Williams makes the receiver site for the Buffalo Classic). If it is the WGOS they make different blades including a fiber-optics ghost ring that you might like. You'll probably want to replace the front site as well and I think they are soldered on. I like a gold bead on a post for a front site and I'm going to try and modify the one that came with it. If that doesn't work out I'll use the Williams Shotgun Shorty Ramp in 20 gauge and have a gunsmith install it.