I believe he is going with peek in the upcoming and any future batches rather than Ultem.
Robs general concern was that people who don't maintain their mods or contacts and try to vape at super low resistance *could possibly* melt the ultem but not the treated wood on the V1. I believe he tested the ultem and ultimately the peek and decided that it would hold up to abuse from lack of maintenance.
Don't know if I explained that well or in a way that makes sense but Rob's primary goal with the insert material is a hoople proof mod, thus he felt that the ultem, with its possibility of melting if in the hands of like the 0.15 ohm vaper who doesn't know about basic contact maintenance in a mech, may not be the best option.
I've run mine in the very low 0.3 ohm range because the wire I had on hand was 26 ga 316L SS and have had nothing but positive feedback for the performance of the mod. I have since built it to a more sensible 0.5 ohms now that I have 28 ga 316L SS though.
Yeah
@gpjoe bro, been experimenting with some flavors and have settled on one in particular lol.