That seems to be normal honestly, i have 2 aftermarket 0.78mm straight pin, a cheap nicehck 16 core and a xinhs 8 core.IMPORTANT UPDATE ON THE AZ09:
KZ, I hope this is not a QC issue. I don't know why I didn't try it with the STM yesterday, but glad I did today...
I just can't fit the AZ09 with the STM unless forced. The feeling's like trying to jam a key, similar to the correct one, but not meant for that lock? It'll go in and twist, yes. But does it feel right? Trying to remove the connection was a nightmare.
I do think that filing away from the inside to enlarge it will work but I currently do not have the tools for that.
So...
Works flawlessly with DQ6
Fits but not perfectly with T1 Plus
Connects when forced but is scary with STM
The nicehck fits like a glove with kz zsx/dq6, blon 01 and nf na2.
But the xinhs was really tough with blon 01 and nf na2.