When he was trying to help you?
The only undesirable behaviour was your rudeness to somebody who had taken the time and trouble to help you.
Even you must understand that the "expensive model railway" wood sections are made by somebody who has bought a large piece of the right wood and the correct machine tooling to produce it. In the small volumes we need, it is simply not worth doing it ourselves.
You didn't mention which engine until the second time around. When you described a do-it-yourself project saying you wanted to build a batch of five.
Most people without knowledge or experience (suggested by your question) build one, from which they learn.
If I'd meant that I would have said it.
In other words you aren't interested in the answer.
Why the personal lies?
I should have killfiled you a couple of months ago.