I'm new to the GGTS and confused. Does the Penelope fit directly on the GGTS or will I need a connector of some kind? Wasn't clear on that part. I do know that I was so blown away by how well the Penelope was made and how well it works, that I had to get a GGTS
You will need some adapters, check this post:
http://www.e-cigarette-forum.com/forum/clouds-vapor/309684-ggts-pre-orders-25.html#post6816049
Penelope is meant to be used principally with the Proteus (and of course with any 510 connection mod) but it is not available yet. You can use it on a GGTS with airflow control using adapters or with a Stealth top cap without airflow control.
In my opinion the best adapters combination is:
GGTS 510-901 rethreader (included with the GGTS)
+
901-808
+
901-510