That lightfoot mount is a real bonus on the old 99 for aged eyes. I have a Nikon 4-9x40 on mine and its' pretty nice glass, I got a couple Bushnell 4-9x40's and they espouse 6" eye clearance but it's not even 4", less than the Nikon and the glass is not clear at the edges, but then they're half or less the price of the Nikon. I'll stick with the Nikon plus it's got the BDC circles the Bushnells don't. You'll need the redfield high mounts for the 40mm like lightfoot says in his instructions.
