Customizable Trowel / Spreader (OpenSCAD)

This is a fully parameterized trowel / spreader -- specifically for putting an even coat of glue on the floor, but possibly useful for other things. The glue manufacturer recommended a 1/16th inch wide notch (2/32), with a 1/32 inch depth and 1/32 inch spacing, with a rounded shape -- which is what the default parameters are setup to yield.