I believe OKC also has the iSeason, at least that is where I got mine from. Love this thing so far. Would've liked some better locking nuts though. Mine stripped within the first day of use. Not a deal breaker for me at the price point.
If you mean (as others asked) the locking ring on the switch, it's not stripped. You just need to tighten the switch. Mine was like that when new. Just stick your finger in the bottom and hold the brass part of the switch while turning the stainless portion. It will tighten up and you can re-thread the locking nut onto the sleeve. I put a tiny piece of PTFE thread tape on the end of the brass threads to keep it tight.
Lock rings on mine are just fine.
Also, the entire Iseason tube gets warm if I chain vape.... Not hot, just warm in the hand, and spread throughout the entire mod. Doesn't do this with coils at 1.8 ohms and higher. Normal? Or is this the hi resistance spring showing its ugly face?
Yes, you're likely getting the warm tube from heat from the spring. I modded mine and it never gets warm, even with low-ohm coils.
Get a brass/copper spring from your local hardware store. Mine had several sizes.