Don't understand T junction, from Aneros welcome info

Take your Helix, hold it in your hand.
Orient it so that it's in the correct orientation, with the more agressive section closest to your prostate, as if you were standing up.
Now turn the Helix upside down.

It looks a bit like a T, right?

The T junction must be where the tabs join the main part of the Helix.

@lonewolf8, this is indeed powerful when done in the standing position. I had a great time working with Eupho Syn and Helix Classic in the standing position earlier today in the noon hour. It only took an half an hour of my time!

Don't understand "T junction",

@lonewolf8 is correct, if you invert either of those models, the P-tab arm and the handle arm (or K-tab arm for Trident series) would form the crossing top of a capital "T" the junction is where the body shaft of the massager meets this "T". You don't need to insert the massager such that this junction contacts the outer anal sphincter. It will likely naturally settle approximately 3/8" to 1/2" away from the anus.
Good Vibes to You !

@lonewolf8 is correct, if you invert either of those models, the P-tab arm and the handle arm (or K-tab arm for Trident series) would form the crossing top of a capital "T" the junction is where the body shaft of the massager meets this "T". You don't need to insert the massager such that this junction contacts the outer anal sphincter. It will likely naturally settle approximately 3/8" to 1/2" away from the anus.
Good Vibes to You !

Thanks rumel!!!