I made this from a piece of a flexible ringbinder, that I’d bought at Morrison’s supermarket for 99p!
Initially I thought it’d be a great idea to score the plastic piece I’d cut out, prior to bending:
The stuff is easy to cut with scissors by the way.
Anyway, to obtain the curve, the panel needs to be slightly longer (by about 5 – 10 mm) than the length of the Unicorn HAT. Best to adjust this to your own personal curve tastes. You’ll need around 3 – 5 mm of material to form the arc* of the folded ends, and then about 8 – 10 mm for the retaining flap which holds it in place. (Mine is more like 11 – 12 mm).
The first attempt after drilling the holes into the retaining flaps — I attached the diffuser underneath the Unicorn HAT. Don’t do this..!
(Hey if you do, please let me know how you achieved it!!)
Secure the screws to the flaps with nuts & washers as shown in the close-up photo, then you can slot the whole assembly onto the HAT.
*To form the arc (folding the flaps) just fold the material. I used a pair of pliers, but a bench vice would be perfect. Make several gentle creases so you don’t split the plastic, and you’ll need a slightly sweeping arc anyway, to go around the head of the screw.
I haven’t even tested it yet as it’s disappeared into my son’s bedroom…