Yeez, you saw the fault.
No, it's not upside down. It's just the second part that needs trimming. I didn't want to sound to negative myself, so I didn't mention it. There's even a bigger mistake in the model: I forgot to colour the bottomside in grey. (Were was I when I was designing this model?).
So this model is on my redo list (next to the request and the wish list). gonna have to prioritize.
Thanks for your comment. Always appreciate when quality can be improved.
S&P