Super Bronc Question

#1
As I have gotten older my Gluteus Maximus has gone from chiseled stone to an old bowl of Jello. That being said, it makes the WigWag in the seat of every Bronc I have very annoying. Has anyone come up with a cure for this Broncitis. It eventually wears out the front 3 holes on the seat hinge. If somebody has fabbed a cure I need about 6-7 for the stable Broncos I am going to be working on when I retire next year. I could use 3 right away for the ones that are rideable. I love these bikes but the seat set-up is a poor design. Any help would be appreciated by this Ol' Jello Mold.
 
#2
Make. "T" out of flat stock. Line up the 3 hinge holes in the top part of the T and put a couple more holes down the long part of the T... Screw it to the wood.
 
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