Thanks guys. I went home and sweated over a stainless steel ruler with 1/32" markings. Best I came up with was the WGRS is 4/32" taller than the semi-buckhorn at the lowest setting on the WGRS. I'm going to think out loud here so you can correct me if necessary. That means the WGRS is 1/8" taller (0.125"). If I add just that amount to my stock front bead I just get into the adjustment range. So, I opted for the .525" front bead to give me another 1/8" of height. Not too tall on the end of the barrel, and I can leave myself some adjustment up and down the scale on the rear sight.
I sprang for one of NKS Precision's crosshair sights, the duplex one. Midway USA had them for $26 and change. Looks pretty trick and the small wires should help my eyes at longer distances where the bead hides the target circle. I like the usefulness of crosshairs, but hate how scopes give you tunnel vision and how they look on a levergun. Besides, if you shoot something too far away it makes for a long walk.
I should get it all switched over after our first deer season is over on Nov 23. That gives me two weeks before the anterless only season reopens in mid-Dec. I'll keep you posted.