How about a multi-link rear shock setup, like many motorcycles use? Sounds good, having an increasing resistance with movement of a linear shock? That's what the new 2017 Tmax has; guess where they got the idea?
From the fine folks at Zeus Lightning in Taiwan. Here is their 2015 prototype for the Tmax 530:
...and the finished product with an Ohlins shock:
...and installed on a Tmax:
This is them:https://www.facebook.com/Zeuslightning. ... =3&theater