Up until my last Heaven-Gift order all my 901 attys were of the same type: fairly large wick that had "wings" on either side of it. I just looked at the last batch I received and the wick is smaller, no "wings" and it comes to a sharper point at the top. Both types are marked SLB. Is this new type supposed to be an improvement? I'm vaping on one now and it does seems to have better airflow, but that might just be because it's clean.