Hi, Gibby
Here is my AF080C mounted out to the side. And it makes a mighty good general fill flash in TTL mode on the ist ds.
https://www.box.com/s/afeb02665731a33c79c3
I machined a post threaded for a 1/4 inch standard tripod bolt, and flats on top for the AF080C M3 auxiliary mounting screw.
I have been intending to make a flash grip that protrudes directly forward with same method for macro, to point a lens through the hole.
The Pentax K mount will not fit through the 49mm thread of the AF080C, but the SMC Pentax-M 1:4 100mm macro might work if the mount is butted up to the flash hole.
I did a test shot on another thread in Macro just with the ring flash out to the side as in the above photo link:
https://www.box.com/s/02a1db89273d92d6a6c2