The thing is though that when I clicked "Submit Reply" I got a message along the lines of "Your post will not be visible until reviewed". A short time later Tu-114's post appeared with no sign of mine.
Is this because of my probationary status?
Very likely - i certainly saw Tu.114 's reply before yours. i seem to remember something similar when I started posting.
Toyo TT-10 for your current challenge ?
Cheers Doug