No worries, Mark, will update once I run some more tests.
For comparison, here are some non-uniformity numbers for other panels:
https://www.astroworldcreations.com/...t3-conclusions, Non-uniformity section.
The build quality of the Giotto seems fine. Looks like a 3d printed shell, but pretty sturdy.
Something I noticed, my 5.5mm 2.5 and 2.1 DC 12v cables did not fit the power socket. I tried with my cables as the included one has a cigarette lighter on one end and I prefer both ends to be 5.5mm DC. There are adapters with female cigarette lighter sockets to DC, so this might be an option. Not an issue really, my cables might be picky
In terms of brightness, it’s plenty. A 3nm narrowband filter at f/6.4 and gain 100 gets me an ADU of about 28k (this is close to the optimal for my setup) with a 2 sec exposure at 2/3 brightness of the panel. This is pretty good as I was worried it might take minutes for the narrowband flats, based on people’s experience with other panels.