All 808 D-1 cartos are not created equal???

[proax9]

I have a PicCig, which is working well using the Mega (808D1) cartos as well as standard size 808D1 cartos. I can also use an adapter (D1 bat to D2 cartos), successfully on the PigCig to use up some D2 cartos.
I just rec'd (generic) KR808D1 manual batteries, and a KR808D1 USB passthrough.
For the manual batteries and the PT:
The Mega cartos have NO air flow (tongue actually gets pulled /stuck against tip on carto).
Same with the adapter when I try to use the D2 cartos.
Only the standard KR808D1 cartos have air flow.

What am I missing?
Is this a known issue , is there a remedy?
(only 3 weeks vaping and I guess I missed something?)​

 

[dormouse]

I don't have any megas si this is all guesses based on other cartos, but

If they are not heating at all then it's possible the inner circle of the threaded end of the carto may need to be gently raised

If they seem to be working but not drawing, and are soft cap, pop the top.

Are they the kind with a donut-shape inner seal over a thick wad of stuffing w/ no defined center channel? If so, then they are like the standard size SLB ones and my standard size ones can get hard to draw. It may help if you can gently open up a space in the middle so you can see light - but be careful - you could damage the carto.

Are they the kind with a hard-edged defined center channel? If so, then they may be similar to Boge standard cartos. Can you see light through the carto? Of not then the air channel is angled or off-center and is blocking air flow. Use a totally straightened smooth paperclip and try to gently straighten the air channel so you can see light through the carto.

 

[proax9]

They all heat / vape- but there is absolutely no flow, it's not just limited- there is actually a vaccuum created when you take a drag. Since my initial post:
I put just the adapter (D1 Bat to D2 carto) on the D1 battery- ZERO air flow.
There are 4 notches on the adapter's battery end- that are the same depth as the notches on a D1 carto that works, but the length of the notches on the adapter are approx 3/4 the length of the notched on the D1 carto that works.
I would try and make the notches longer BUT the adapter works perfectly on the D1 PigCig Batteries and do not want to screw that up.
So I am wondering if the holes on D1 bats and / or the notches on D1 Cartos are not standardized between manufacturers.
(By the way, my adapter does NOT have the adjustable center post as I have seem on YouTube videos.

The Mega D1 carto, I noticed have only 2 notches on the battery end, which could explain the lack of flow.

Unless someone has a 'fix' for this issue, I guess I will have to ditch by D2 cartos (as I no longer have the D2 batteries)- but it still sucks that the mega cartos won't fit on the generic D1 batteries.