Progress is definitely being made - by early afternoon the only function I didn't have working was autofocus.
I had the lens set to 'A' to allow me to use TAv mode, which is where my K3 basically lives.
I had a wee brainwave, and thought Av mode, select aperture and lets see if it will focus - sure enough it did.
So, the only thing on the lens at this time that doesn't seem to be working is autofocus when the lens aperture is set to 'A'. I will keep exploring over the weekend to see if I can get it working with that, but I can live without aperture on 'A' if I need to.
I only have a ball head on my tripod, so static subjects only at the moment - gimbal head is on order
Just some more samples for your enjoyment. Once I have the gimbal head I will try for some bird photos.
I have to say, I love the colour this lens gives.