Thanks all - good to know. I wanted to make sure I was not totally in the wrong by wearing it.

I do enjoy the look of the fly plaid, although only for very specific occasions. I'm not sure I can even think of a time I would wear it again. Black tie events dont come my way very often. In fact I even think the PC is pretty extreme for most events - which is why I'm just renting it. I'm planning to buy an Argyll jacket and maybe a waistcoat for future wear to standard formal occasions.