EROS 2 Unused hole

[MisterM]

When building my Bottlehead kits (all 10 of them) I incorporated a power on LED that required drilling a ¼” hole in the top plate. Now building an EROS 2 and noticed a ¼” hole between the EF86’s that appears unused. It is 1 ¼” North of the ground lug. What is the purpose of this hole and is there any problem using it for an LED?

 

[Paul Birkeland]

We left this hole in the layout to allow for the possibility of making a Tape Eros 2, which requires adding a switch.

 

[MisterM]

Thanx, now I can save wear and tear on my drill bit.