During the good work I think someone unplugged the Dropcam, the window says that it's not online.
Opinions differ a lot when it comes to bench height, I know that Dave prefers to stand whilst working but others prefer sitting. Your alternatives are therefore bench stools and keep the nominal 900mm height or make them about 700mm from the floor, about the height of an office desk (my worktops are 30mm thick).
Edging around the bench to stop stuff rolling off, yes or no?
Don't forget to leave space underneath the bench for a fridge, a beer whilst admiring the pile of repaired equipment is a nice way to end the day.