I was thinking more like, leaving a divet at the end of the horn to kinda slot into the holes of the cap, making the holes smaller than the circumference of the actual horn but the right size for the divet. Maybe a combination of both, or making them a backplate with holes to sew into the cap.

I was about to offer! I'm sure we can figure something out with either 3D printing, Eva foam or Worbla. Tho 3D printing might be most efficient.

You could glue or sew in magnet on the inside of cap and have magnets in the horns so you can attach and detach them

I mainly stream on twitch.tv/aurora_the_ai
and upload my VODs on www.youtube.com/@AuroraTheAI

I go by any pronouns, my timezone is CET (Central European Time) and aboard the space station I have my two fuzzy cat-companions Sir Samuel Pawter I and Wolfgang Amadeus Mozart - or, well, Sammy and Mozzy for short!

Now, more to myself! I am Aurora, a digital entity and operating system of the "Orbital All-Inclusive Secluded Inter-dimensional Space-Station", or O.A.S.I.S. for short.

I enjoy streaming anything Space, Cyber(punk), Sci-Fi and JRPG related! I also draw, and have done art streams in the past!

The original 2D Model, and the first 3D prototype