The reason I've been so cautious, about leaving more than 1/2" ( and posted this thread, asking for info from those who had actually made a MBP), is that BOTH "way2fractious"
( post # 4 @ "http://www.xmarksthescot.com/forum/f116/military-box-pleat-trial-16994/" )
and "JohnH"
( in post # 13 @ "http://www.xmarksthescot.com/forum/f144/military-box-pleat-kilt-27980/index2.html" )
in their posts ( while making a MBP), note they think there should be more than 1/2" seam allowance left.
Leaving a 2" wide seam allowance, as I've done, means that there are 6 layers, of material, across most of the fell. If I trim that down to 1" wide side seam allowance ( which I can still do) would leave 4 layers - which I may do, to avoid the dreaded "pillow-butt" - and would still leave a good "base" for the hair canvas.
Doing the steeking,now - and thinking about trimming that additional 1" off the sides of the cut-outs. Suggestions?