Okay, what has it been? About 2 weeks?
Love all the back and forth banter.
The ones that pop in just to sat they won't be getting one. Okay, why even post?
The ones that with little to no previous RBA experience, can draw expert conclusions as to quality.
The ones that don't trust the materials they obviously cannot inspect first hand.
First let me say this. The KFL+ Black is my 18th RBA.
Including my AGA-T, RSST and 3 Ithaka's as well as the other lesser RBA's(to me) this is the nicest device in my collection. It simply performs perfectly and is as fine a Tank as I could ask for.
A few notes:
Adjustable center pin - loose and might back off or fall out? No, that is by design. Same as the Ithaka center pin. it can be backed out. You install the tank and the screw makes contact, but allows the tank to continue turning to seat on the mod. Can't fall out, mod is under it.
Air Flow/Whistle - Center shaft alignment? Not hardly. The center slot is to direct incoming air up through the chimney. The area where the slot sits is much larger than the upper and lower bore. Plenty of room for air to flow around and up.
*don't worry, I had the same thought before a full tear down and inspection.
Member complaining of very tight draw:
Maybe it is time to fully strip it down and inspect everything.
The device obviously has a blockage that is NOT a normal design issue. Probably a piece of metal or plastic in the air passage.
Member concern - Adjustable center pin needs to be tight to avoid leaking?
1) Air flow is from the side.
2) Center Shaft sits in seals
Pin is to be set at whatever height is needed for proper contact with mod.
Take some time and get acquainted with your equipment. The more you understand the better your experience will be.
Extra tank
Adjustable center pin
Raised center shaft(did you notice?)
Plenty of extra pieces - seals screws
Yes, the extra 12-18 is worth it.
In Fact as I was typing this, I convinced myself and ordered a second unit.

Backups!