To answer a few questions:
The material used is a "ureathane plastic', It is a very tough material.
There is .01" shrinkage per inch of mold. (negligible).
The 6:32 screw holes will be 'tapped'.
You will re-use your original Lionel screws.
The castings are done in 'black' color.
We will be listing on our web site most likely by this weekend. Orders will be sold and shipped as received. I do not want to offend or cut short anybody on order placement, as I think this is the fairest way to accept orders. Harry