I'm sorry if this has been brought up elsewhere, but I did a search and come up with nothing helpful.
I'm looking for input from those who have made molds and casts for the earpieces. I'm particularly concerned with the rangefinder ear cap - the one with the little prism-shaped jog at the back. I expect this will need to be a two-piece mold, and I know how I would go about making it, but I was hoping to get some input on how to do it from those who have done so already.
This is what I'm thinking; place earpiece front downward in molding box, pour silicone up to the edge of the "D". Let it set up and add some keys with small bits of pre-cured silicone around that base. Allow to fully cure, put mold release on surface of silicone and pour the remaining portion of the mold. That all makes sense, but do I need to have a channel running anywhere into/out of the mold? Should I leave a hole for pouring, or for overflow?