Alan, none. In the past, before kilts were in my life and when I was still a musician, there were a few times that I donned a white dinner jacket and black bowtie to perform, but that is mainly it.

I do try my best to keep a closet full of suits, no tuxedos, ready for anything that might come up.

On the other hand, I have done my best to be aware of formal and semi formal, Highland attire, and how it is properly worn.
At this time, I have no formal, as in black tie, attire in my closet.

You should have a jabot and doublet, if you are able, because they look so darn good.