Hi Upfront, I have seen your different takes on the Inlow paper horn, interesting especially the pink mold, so corny, haha. I have been down this road myself and I ended up making a paper pulp of wet A4 paper/toiletpaper (not used ), sawdust, woodglue, wallpaper paste and a little bit of plaster. Mix it in a bucket with a drill for making cement. Then roll it out like pizza dough and clap it on the mold. It is quick and easy and makes a very strong horn with good internal dampning.