To download this schematics you need modpacks in atlauncher from gearworks packs:

Anyway this build is a scouting station designed to keep you safe from any mobs while your taking a look at your schematic cannon doing its job you probably thinking of a place of where you can safely observe the rest of your schematics. This is a scouting tower to allow you to see how your schematic cannon is doing while its doing its job.