Sometimes I like to hold my bins upside down and use my thumb(s) to focus. This does not seem to impede on my maximum viewing enjoyment so it should be ok? I can then mount my bins on a tripod upside down and not concern myself over the clearance between the barrels and the width of a tripod adapter.
Does this mean i'm bi-focus or just plain weird? 
Doesn't anyone else use their bins upside down?
No but I'll try it and let you know........... Idle minds.......