Hanging with extender head piece
If you have an extender with the strap type head attachment you can make it into a hanger (takes 5-10 min).
You need to drill two holes in front of the head piece, One on each side, Then you need a piece of nylon line around 2-4 mm thick (has to fit in the holes you drilled), Secure it with a knot on each side.
And you have to change the rubber strap with an adjustable nylon strap (They are normally used to secure equipment when back packing etc).
I use this for hanging, I hang SO with 4 kilos, And I use a piece of an old t-shirt as wrapping.
I have attached a few pictures, The last two is pictures of the nylon strap I use, This is great for clamping also.