Sorry, I just don't think it's a very active thread, you'd probably have better luck elsewhere, or just searching through previous posts here and Reddit etc? I don't have one of these and I've never built my own coils so I can't really help you there
Okay I would definitely suggest getting a better mod, but you can also look into a better coil option, I bet Uncle Mark could help you out as he does these builds based off splinter and imp on Instagram, but you could also reach out to
Alan@toasty-top.com to get one of his steel mesh spiral galaxy heaters like he uses in his iHeat, I got one of those to install in my Herbie and I see no reason it wouldn't work well as a heater in the StemPod, as long as you give Alan all of the size dimensions so it fits properly (could even just send him the stem pod?) Hit him up and see if he can help if interested...