Two of the issues with RBA's is
always going to be:
1) "Can I get in here with my fingers/tools?" and
2) "Can I see what I am working on?"
(Adjunct to that is "Can I get replacement parts?" - I broke my Tiamat center-pin at the shoulder where the threads start).
I can vouch for the
Tiamat being a nice, (albeit overly heavy/thick), device. It was my goto-atty on my homemade OKR-mod, although mine is a v1.
Currently, I am using a
DV Griffin and had great success for a few days with mesh. Last night I suffered a night in H-double-hockeysticks: 4 coils in 4 hours - rewinding and reconnecting all night. Today I vaped a mini-nova clearo just fine.
The issue I had with the Vamo+Griffin is that silicon gasket under the centerpin in the head: it's being forced aside by atty like the Griffin and I need to perform
the o-ring replacement procedure. I've got to buy those #60 o-rings, but meanwhile the Griffin is rigged with silica (I was doublechecking mesh-issues), and with the addition of an eGo/510 adapter, the Vamo is behaving well again.
Yes, SS mesh is really nice - when it works. And, believe me: you want an atty you can get inside of. I hear the RSST atty are also supposed to be good, but I have yet to try one. The jury is still out on Ceramic wicks, but while very fragile to side-pressures, I understand those vape nicely as well. However, price-wise: silica or SS mesh (400 or higher) is likely the best-bet on RBA's.