It's not necessary to use the Lemo Drop...but OK. I don't know the air port size, maybe 2.5mm? I'm currently using 28ga wire.
If you have any 30 gauge try it. If the air port is 2.5 mm make the coil so it is 2.5mm OD by 2.5mm wide. For 30 gauge (0.25mm) that would be a 10 wrap contact coil.
The key is to keep the coil within the airflow.