I'm not showing it under the list of technologies as an option to research. But as I just clicked on Rocket Silo, it's showing up as a recipe gained from researching the Rocket Silo. Putting it as a separate research may make it easier to find and know when you will have access to it.
lol that's a great dialing interface, love it. The gate would still work if the collision box was non-square right? I'm thinking left/right facing rotations would be cool (if it's a static graphic, I would even make it for you). Caution, don't stand in front of or behind the gate unless you want to be entity.die'd/destroy'd . That'd need more work of course.
I wonder if it could be made to dial/activate by circuit... you got me thinking things