I have a 20 plate Scala, and for a while now I've found I'm forever adjusting the seat back and height adjustment to get comfortable. I previously thought it was just me preferring a different position, however this morning I've found this not to be true.    I set the seat to the position I liked and aligned two markers, and then sat in the seat and gently rocked back and forwards for a minute. The adjuster had rotated backwards. (I'll be trying this in the dealership with their c