dang hildi, it seems we have the same things all around... heheh.
In my case the Iken stealth closed adapter fit the HH 901 while their own (Avid) adapter didn't; not yet anyway.
Funny thing about the HH 1.5 LB I think i just about give up on using it on the Reo Mini.... it vapes like a SR with no ooomph... i put it on an eGo p/t and boom! wth, i usually drip on these monsters anyway, being the Reo Mini 3ml bottle is so small anyway... a few vapes and it's half empty... heheh
I have the 901 HH 1.5 on a VV at low low voltage. The regulated power is the way to go with these imo.
That's my impression so far... 1.5's are not like conventional which are very hot in my experience.
gotta say the Cisco LR 1.8 901 is hitting like a 1.5... i have vodka cleaned it and it's on the Reo..... boom.