>From that image, I think that most of your problems could be solved by proper modularization of your code. Don't do it all in one module, split it up in several modules. For example, start with the base shape in one module, then make another module with the "sliding arrow" thingy. You can then simply diff the base and the arrow to make the cutout (with some size-altering operation, such as a minkowski, to add spacing). -- Sent from: http://forum.openscad.org/