Piper's plaid with something other than a doublet

[Arnot]

What I'm curious about is how someone would even attempt to manage the stuff that has to go on at the left shoulder if they were to try to wear a piper's plaid over an Argyll jacket.

Maybe add some sort of tie to secure the plaid if the epaulette were not sufficient? Still not the best idea to wear it with the Argyll jacket, though.