Celtic Bears Logo

At this moment I'm working in a logo for a local Pipe Band called Esbardu, this word means bear cub in Asturian language. The customers asked me for a tetraskele for their logo and here you can see my final design. To find sources of inspirations for this work was very hard, the bears are misrepresented in historical Celtic Art, I just found some samples from Pictish stonework.
The next step, to add color.