We have made a little change in our seat lowering bases to better the product. Now we have custom made delron molded blocks to hold the bases in the factory tabs. These have a metal threaded time zurk molded into them to hold the block to the base. We locktite the screw and glue the block to the base to insure they stay in place. These make the seat bases fit more snugly while improving the quality. Still the same great price at $117.95 a set and with your forum discount they are $112.05.