With the idea of these two london wide boys in place, I set about the design. The painting certainly has a somewhat simian quality, and as had two London geezers commentating the only choice for me was two "Cheeky Monkeys".
Dimension Sketches For 3D Modelling
And here's the models I rigged up in Maya in their bind poses ready to go.
A second shot, here you still see the tail joint which in the end I didn't skin, as I thought animating the tail for 2 minutes would be a further pain in the arse, and I'd probably have only used it in one shot anyhow.
A transparency to give a greater idea of the skeletal structure.
Side view overlaid on initial dimensions sketch