I have had a few seats on my beach cruiser looking for the most comfy. My question is, is there a way to adjust spring tension on these seats? I have a Nirve seat and a couple C9',s and they all have NO spring action at all. I weigh 180 and can't bounce those springs if I try. They're USELESS unless I weigh 300-400 Lbs....and I don't. So, is there an adjustment? Longer studs? PLEASE do not suggest different shape seats or foam Vs Gel, as I only ask about the springs in this thread. If you have a suggestion/answer, please elaborate. Thank you