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Poured a few this weekend
I could not find a 1/24th mold so I sacrificed my 1/32th to give it a go. I used a blank bit with no cutting edge in my hand drill and let the heat and friction do the cutting for me. That way I had good control over the cutting with less of a chance of messing up the mold. After I got it drilled out I used a std bit and ran the drill in reverse to finish out the hole. Then I used a file to smooth out both faces of the mold so that it would close properly. The new heads are more aspirin shaped but that does not mess with the action. Plus the little bit of the 1/32th head that I did not drill out looks like eyes (they are a little uneven lol). After paint can't tell a difference. These are not perfect but they fit the bill. I don't have a scale small enough to measure each cavity but a lot of 10 measured out to be equivalent to 10 1/24th's that I purchased. I now have my supply for the next month or so. Jigs shown are 1/24th, 1/16th and 1/8th. If you have a drill press you could do this pretty painlessly.