I suppose he might just have forgotten the key. Frustrating - I kind of hint I'd like some help as he flies past doing ten jobs at once.
When I talk of sheds in garden, there are several - some containing mills and lathes (5), and some, electronics kit. He is a total Fred Dibnah replacement, except he works at micron accuracy. All hobbies.
BTW - what is the key index? ( 1-4 )