I ended up smacking the seat, per the Corbin instructions, and it worked. Unfortunately, while the seat is comfortable, especially the back support, for the first time ever I did not enjoy riding my Rocket. I think it may be a height issue because the Corbin seat is almost two inches higher than the stock seat. So I was leaning over just enough to cause my shoulders to ache. Can't send it back (good 'ol Corbin customer service) so it's now back in its box on a shelf. An expensive trial...