I am curious about removing the fiber optic from the post/ tower. Has anyone done this? Not just the fiber optic rod itself, but the clip that holds it in place, as well? I'm curious about replacing the fiber optic on the front sight post with a tritium shotgun bead. I see in another thread that AbyssDncr put one on this vent rib SA20, and also on his SA459. But the front sight posts on the 459 appear to be constructed differently than that of the SA20 tac. For those that have not done this, but do own the SA20 Tactical--- Is the rod/clip thing on top of the front sight post attached with a screw? Something I could remove separate from the tower post? Thanks in advance.