Mel, Check Geoff104,s gallery. He has visors and I think his windshield frame is like yours. Be VERY careful when drilling the mounting holes!!! DO NOT let the drill bit go in too far and contact the glass. It would be best to use a very short bit that was only long enough to reach thru the frame but not long enough to reach the glass.
Also, not only do they do a great job on the glare, but they sure cut the wind-burn down a notch too! I think they look great on the car, just make sure the positioning won’t interfere with your soft top.