Bought my 93sv & LS from Brian, as well. Bought a mount from Cumberland Crappie that is expandable like yours, Bluesraider. My mount has a slide in base with two screw downs, and one on the shaft that allows the shaft to go from about 1ft high to nearly 2ft high. Lucky for me that I got it when I did, as the owner/maker of the Cumberland Crappie products had heart problems & had to close up shop. I think he's only selling what he has left in inventory, as the website is closed & orders have to be made by phone call.