I'm likely not going to be doing many of these, but talk in the thread made me want to do this at least. And it was SUPER easy!
Legends Hulkbuster Vision's cape, peg cut off, length trimmed down. The plastic is soft enough that the..."neck...part...?" lol, fits around Mario's much thicker "neck" (wedged between his head & shoulders). Completely removable.
Warning! FRAT! :