Bulwark spidertron Mk1 is armed by rocket launcher, but it's technology doesn't require "Rocketry" in prerequisites. Maybe, you should add it?
And one more - i'm finalizing the translation this mod to russian language. Can you add it?

Hello, sorry for the late reply. I would be happy to accept a pull request to the mod if you make one. If you can't do that, I can make the changes if you provide the data.

Well, i've taken a pause from Factorio, so i haven't seen your reply, sorry.
The translation of this mod is ready, also i've edited the "technology.lua" file, so Bulwark Spidertron Mk1 requires "rocketry" now. Where can i drop the files?