carcassonne game river add-on Interlocking 3D tiles

addon for carcassonne game . based on http://www.thingiverse.com/thing:34295 , new interlock pad for the river side.

could be printed in muntlicolor as I add the river 0.3 mm deeper than the land.

but may be tricky as need 3 color (green grey and blue)

I'm printing it in white ABS 0.1mm heigh 0.5mm wide.a bit long but nice results. I intend to paint them all
(edit 1) the results are better with 0.2 layer, the bridges over the small hole in the wall are better and there is no advantage