>>106624646
A whole lot of empty space, which isn't too surprising.
That being said the case is properly grounded, it has a 5A fuse built in and that heatsink on the triac is beefier than I might have feared. Board quality in general looks fairly good.
The board is a kasadl 858DP Rev F with the date 2023-03-24, so not that old all things considered.