Yeah, I started this thread. Doesn't mean I bought a B4.1 right off the bat. My old RC10 Graphite, RC10 CE, RC10B2 and RC10B3 springs/bodies all eventually rubbed. I figured that 15 years later, AE would have solved the problem but engineering better tolerances between the spring and body.

Let's see some pictures of the Durango springs your B4.1. Thanks!