So I can just keep cutting into the material as I make the pleats - is 31 pleats the standard military pattern? Its just that on the first photo of this thread - I think of an ex military kilt, pleated to the stripe, there are 34 stripes.
Thanks for pointing that out, Pleater. It seems that I now have a very large quantity of egg on my face!

I just rechecked both of my ex-Army kilts and the Black Watch (knife.) has 32 pleats. The QOH (MBP) does indeed have 33. (The stripe furthest to the right in the photo is on the edge of the apron.)

So, I mis-counted TWICE and I'm supposed to be an engineer.

I had been looking at photos of ex-Army kilts from other regiments on eBay and it sort of looked as though there were 31 pleats on all of them. Now, I'm not so sure. I suppose I should do some more research to see if I can find information on the details of the manufacturing contracts for each regiment's kilts. Maybe the Imperial War Museum's uniform section. I won't be back in the UK before October, but, I will make a point of going there if I can't find out online.

I looked back at previous messages and there is one pleat not folded back - it said the deep pleat at the right of the apron - that is the under apron - right?
No, this time I am right. (3 in a row would mean sackcloth and ashes!) The first thing you sew if you follow Barb's instructions is the RH edge of the apron to the deep pleat and, yes, it is not folded back.

So going back to the original pleated to stripe MB kilt - is has 32 reveals, one of which is the larger pleat at the right hip, and 31 other pleats?
The first MBP I made has 31 pleats, including the deep pleat. The very big pleat on the right hip should be the inverted pleat and it is entirely hidden.

It is too late to change the one I am making now, as I have cut the material. (There would have been enough for 1 more pleat, but not 2.) Besides, I just finished sewing the pleats and I really don't want to start again from scratch.

I may just have to change the last line of my sig!