Looks like I’m the latest victim of this poor design. Thankfully for me, it happened while the seat was off the bike and I have a spare rear seat cover. However, until this is fixed, I cannot go riding with my significant other.
I know this is an old post but I hope someone who has been through this will see this and can help.
In my case the thumb screw is in and I cannot screw it out because, what I assume is a captive nut, is spinning on its own within the plastic casing. I have tried using vice grips on the thumb screw (as you can see) and pushing down hard on the seat, but I can’t get the captive nut to hold enough to get the screw out.
Would anyone know if it is possible to access the captive nut from the other side by first peeling back the seat upholstery?
Another option, mentioned in this post, is to drill into the side of the plastic that contains the captive nut to hit the nut and therefore poke the nut enough to hold it in place. If that is an option, where should I drill the hole. The plastic column is just about 30mm from top to bottom but where, in that space, is the actual captive nut located?
Or, is there another option that I should be considering?
Desperately looking for a solution!