User blog comment:The Reptile King/Mechanoid Beast Workshop/@comment-27950421-20170127185600/@comment-27950421-20170129131913

Well you can do that. You can put up a custom model here, however you have to make a mass produced (MP) model first.

And when I say "you" I mean the guy sitting behind the computer not the character you RP as. Your character is not involved in the production of Mech Beasts even if he has a custom Genoa Breaker made for him. It seems like some folks have issues discerning when I'm talking about the in universe "you" and the meta "you" so I figured I'd make that clear.

Of course your custom model doesn't need to be custom version of an already created mechbeast and can be completely original and not be related to another MechBeast in any way. Just read the rules before you do it.