Heraldic Embroidery on MoD Cloak

I recently was honoured to add a friend's device to the Cloak of the Masters of Defence in honour of his elevation to that Order. The Order of Defence is given to those who excel in the field of Rapier and or Cut and Thrust in Lochac. Peers must also support the Crown and kingdom, display courteous and noble behaviour, share their knowledge and skills with others, practice hospitality according to their means, and those skills and behaviours appropriate to the court. (https://lochac.sca.org/canon/award.php?id=517)
The regalia is a white livery collar, but the Members of the Order are also garbed in a special cloak upon their elevation.
The cloak is made of black wool lined in white linen, and is decorated with an elegant and subtle line of black-on-black embroidery. The devices of the Masters are embroidered on the inside in back -stitch with DMC floss 310.
Back stitch is not a stitch that I use regularly, so I had to concentrate on what I was doing.