Yes please – and sorry it’s taken me so long to come back – work fun.
I’ve go a Solarstorm and a fake Solarstorm. The dimensions are roughly the same as Shedbrewed (using my ruler -sorry, no micrometer)
real:
M5 mount hole 7 – 7.5m from back of light
underside is 34 x 42mm (42 is front-to-back measurement)
Fake:
M5 mount hole 7 – 7.5m from back of light
underside is 35 x 42mm
Both lights have a very shallow, 10mm wide channel about .5 to 1mm deep running the length of the underside that’s the full length of the light at 42mm long. you can see it in Shed’s last pic.
I’ll drop you a mail with some pics, Piesoup. I have an engineer mate who will probably have access to a micrometer and be good at measuring things. 🙂