The only core components available as a guardian variant are power plant and power distributor, anything else is for optional slots or hardpoints. I'd recommend getting the shield reinforcement next,which is an optional module that bolsters your shields by a fixed amount depending on its size, similar to an HRP.Update - got 4 guardian module blueprints. Unlocked FSD drive boost. It makes a difference. I'm getting 40+ LY on an unmodded explorer although I was surprised it was an option and not core. Are there any other blueprints which are additions and not replacements?