Support for long lens w/o tripod collars?

There are lens support adapters of various stripes available on eBay and equipment vendors.

 

When I use a rock or irregular object (or something that may vibrate), I use The Pod (green) with The Cube

Sadly, it's bulky enough that I sometimes forget to bring it, so I'm going to make a mesh carrying case for the pair of 'em.

 

I picked up a fairly expensive Manfrotto support when I was shooting with an E-P2, but never use it now that I've switched to the G2. I've found that - despite being plastic instead of metal - the G2 is stable enough to hold even my fattest lenses (a Nikon 180mm f/2.8, a Contax 200mm f/3.5 and a Canon 135mm f/2) without wobbling or bending.

 

Here is a link to a thread I posted about the solution I use for my Olympus 70-300. I really like this setup despite the $110 for the mount.

https://www.mu-43.com/f67/stativklemme-tripod-collar-zuiko-70-300-mm-4247/

Forgot to mention that I don't use it for birds.

Hope this is helpful,
Otto...