I've been experimenting some with molding tops for blocks from plastic resin. Sadly I have just tried with the stuff I had at hand, which looks like muddy water, as well as being quite brittle. It wouldn't work very good for supporting thin baseplates, but that could be fixed quite easily with an extra copper plate between the baseplate and the lid. It would be a good way to get smooth flow down to the cooling spot..
Now if only my father could hurry up with building his new place (building new house and a 2 car garage + lots of workspace + 2 car carport) I use his place for my experiments as my apartment isn't very well suited for this kind of work
