Gotcha. Well, fingers crossed I got a good one, maybe I can send it to WCW or someone like that for disassembly once it gets changed out to look at the spring.Nothing wrong with the nylon eCore style center tube. Only issue might still be a ruffled leaf spring that doesn't allow a good seal between the leaf spring and end cap. I think the Ultras that use the eCore center tube still have metal end caps.