Lets build a camelback,, or two.

[e-paw]

Well Matt, so far, so good with the boilers. Now back to the cabs. The first step with the molds for the cabs was to pack the inside of the master with "kleen klay" until it overflowed past the windows. This was done because I will make the mold for the exterior of the cab first.    

I then cut a small dowel and inserted it where the boiler would normally set. The dowel was sprayed with dull coat first to seal the grains of the wood to make removal from the mold easier. The dowel will also act as a "key" to help keep the two parts of the mold true during the casting process. After that I cut away the excess clay from the windows to leave a flush surface with the outside edge of the cab, As shown here     I had also set the master into a flat slab of more of the "kleen Klay" to insure that there is a good seal on the uneven surfaces of the dowel and master. This was also trimmed flush with the edge of the cab.

I then built a box from foam board and hot glue as with the first ones.    
I mixed 2 1/2 ounces of each part of the rtv mold mix and poured it as before.    

I just hope that in 4 hours I will have a good mold.