Miles made templates for all the parts he made. The were hand cut and sanded. Every kit was the same as he built several of them. I would go with Miles parts, they fit. The prints may have changed during the copying processes. As for instructions, Miles built as he went, so he may have left some information out. Also since it was sold off, who knows what was changed.
That's what happens when too many people get into kit making. Miles made the parts, John inked the plans and I know someone else had their hand in it. I think w/ all today's cad and newer programing, this would have not been a issue.