Not my best conversion ever, but it will do the job. This is my hack for a 15mm Zoanthrope miniature. I took a 10mm Pendraken Alien style miniature and cut off the arms and legs, bent the tail and did some filing to create a floating alien brain cell for use as a Zoanthrope for my growing 15mm Tyranid army for Gruntz.
This is mounted on a flat plastic 25mm base for reference to its size. Also, each square on the mat is 1cm.
You can see the original Pendraken model in these images. Being metal, just be careful bending the tail. You don't want it to snap off.
Works well enough. Think I'll make some more to curse the 15mm battlefields of the Gruntz future.