well if the SXK and SJMY are anything like the no-name version I have from 3F they'll be excellent! mine is perfectionI do know the sxk and sjmy don't use a spring for the airflow control, instead using an oring... mine however has the spring like the original.
I am having a huge problem getting the airflow ring off….do you think it's because the spring is blocking it.
Any tricks to work it out?