We are trying to put the valve body back together but for some reason we have accidentally mixed up the parts from Bore 4 and 5. We can identify all except the modulator pieces. The 2-3 Capacity and 3-4 TV modulator valves. The are just slightly different with extra groove in the middle section of one and not the other and the barrels are just a little different length. Please help if you can describe the differences!