I sandcasted a new mounting bracket on the weekend. I removed 1/2" from my incorrect bracket and soldered it back together. I used aluminium instead of bronze because I didn’t want to nickel plate it. Can someone please tell me how many exhaust relief holes should be in the bracket or post a photo of one that shows the holes? Thanks.

The resurrection of the Ruddertwin is almost complete. I’m missing three parts. I am on the hunt to find them. If I can’t find them I will try to make them. One piece is the exhaust cut-out mechanism. I have some photos of the outside. Does anyone have a photo of the inside of the mechanism? I don’t know what it should look like.

Thanks for all the help so far. Here is where all your help has gotten me. Sorry if the incorrect colour offends anyone.