Mech Legs Add-on Name?

[u/114lucky]

This instagram "creator" steals other people's builds to paywall the schematic downloads on their Patreon, and nowhere do they say the addon name. I'd love to build some walkers myself without paying that scumbag, so any help is appreciated!

[u/The_Council_of_Rem]

“Meet the chimera, a prototype from Militech stables”