I'll take a look right now!!!
Thanks for that!
Edit - they are not conical to fit the conical indentation - good idea though!! When making them from Isopon or similar you first grease the inside of the hollow base and THEN splodge the gloop in, levelling off with a straight-edged knife. I used to do it with my first Snider back in the mid-80's, and it worked to some degree, but not as well as it did in the Musketoon.