Not sure what else to call it.
There's a third stage that grabs you by the head and zaps your brain.
IIRC we see this in the Fifth Race, Lost City, and The Quest part 2.
Like a lot of things, it was created to be a bizarre alien device, but as the lore grew we had to see it used like a normal device, which makes us question why would the gate builders make such an awkward to use device.
If Daniel and Myrddin can use it like a desktop computer, why does it have a violent head grabbing setting?
I didn't even look to see what community this was posted in. As soon as I read "Ancient Knowledge Sphincter" this was the first thing I thought of. You have a gift with words, OP.