Both units needed some attention in the exhaust stack area, the 555 needs two additional stacks and the 6606 needed them moved on top of the dynamic brake housing. I decided to dabble in resin casting and make copies of an exhaust stack on the non-dynamic hood. I used a basic Alumilite Mini Casting Kit. The results are much better than I would have guessed and it was very easy. The biggest lesson learned was that when casting such a tiny part it is nearly impossible to mix a tiny amount of resin correctly, and there is mucho wasteo. If I ever need to duplicate a part again I'll wait until I have several molds to fill.
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