Well man, just do things right and in the right order.
Apparently you did get permission from Maximus, not sure prior or just now I dunno. It's just a professional sign-off.
All sellers on here get hell from someone for some reason, so its just part of it. You aren't the first that's gotten lit up over something like this, so no one was picking on you.
Its just preserving the future will for people to keep posting their plans for our use and or benefit, and you gain honesty points with your buyers.
No one wanted to mass produce these, you picked up on it, cool, i'm sure folks will appreciate it. Just let it be known the originator gave his blessing and all will be well, trust me i'd be on someone elses case had they stole something from you and tried to make money off it without your permission...
Anyhow......we are all here to help dont get so offended so easily......