Arthur, what TCR are you using for Titanium on your 2380? Did you stick with the 350 that's quoted in the manual or have you tried varying? I don't know if you saw my posts earlier in this
thread, I started out at 350 but have since raised it to 380 - 390, based on feeling that I was getting an anaemic
vape, and the fact that some sources on the 'net quote Titaniums TCR as 0.0038, 0.0039 and I think someone said even a 0.0042 somewhere.
I have temperature measuring equipment now so I plan to soon do a proper test confirming reached temperatures with my Zivipf wire at varying TCRs, but it's possible that different wire sources may have different TCRs so would be good to hear your experiences with your US stuff.