Very cool!

While I too have seen these done in different colors which I thought were "correct" I still like your diorama!

Beautiful piece of work but really the War Machines should be copper coloured and the heat ray 'eye' on the cobra head should be yellow/orange 

Looks good, especially the whole turret blowing up.  What did you use to paint the explosion? I like the whole WOTW thing but I've never been into the 1950's version.  Retreokit came up with a tripod kit a couple of years back, but I couldn't afford it and it is out of production now.

Now that is some excellent work.  Not a surprise from you but always nice to see!