First post!
I may be posting this incorrectly, please forgive me. My C2 ships tomorrow. I am adding the seating cushion. However, from what I am reading and given my bony rear, I don't think it is going to be nearly enough. I also was an avid bike rider (before the invention of the wheel

I am also guessing that Velcro or double stick tape can overcome the sliding.
Thank you very much,