Thank you for your question, Andre. You are quite right; it has nothing to do with scale modeling. That, of course, is why the original subject started with "OT."
While, in this case, I would have thought that the subject line itself would tell you it was off the topic of modeling, my post's subject line began with the letters "OT." The letters "OT" in the subject line means the information is Off the Topic of scale modeling. You see, a percentage of posts here, while not specifically related to scale modeling, are related to topics of interest to scale modelers.
This has been a common practice on RMS for some years. My suggestion to you is that, in the future, you bypass any post with the letters "OT" in the subject line as they are not going to be specifically related to the topic of scale modeling.
By the way, your reply actually had me wondering for a moment. After reading your post, I was puzzled that you hadn't noticed the "OT" in the subject line (it, honestly, did not cross my mind that you might not understand what "OT" meant). I glanced at the subject line of your post and became concerned because the "OT" warning I was sure I had put at the beginning of the subject line was no longer there.
I thought, perhaps, that I'd forgotten to put it in there; a major etiquette violation in my mind. Then I then went back and checked my original post and found that "OT" was, in fact, right there at the start of the subject line. I don't know why or how it got removed in your reply but I put it right back in there again in my response so you won't be confused and think this is an on topic post.
Bon jour............Bill
"The world would be a much simpler place if every one could pick and choose their obligations, but we can't and we shouldn't." Major Charles W. Whittlesey