fischertechnik light cap and covers

Fischertechnik has made several light bricks and coloured caps over the years. De oldest light bricks appeared in 1968 (type 31313, 35886, 35885) in standard grey colour en with an E5.5 fitting. In 1977 a second type of lightbrick followed (38217), also grey but with a click fitting for the bulb. This version has a slighty different thickness for the wall. From 1990 onwards the light bricks were made in black, red and yellow in yet another version. The click fitting is unchanged but the light cap now has two little hooks to click into a rectangular hole on the side. The new light cap is 12mm high and also has a raster to break the light into a broader pattern. So there are three different versions.

I made a general routine in OpenScad that can create STL files for these three versions, including some extra functionality. For example, the height of the cap is variable, a hole at the front of variable diameter can be added and the little hooks are optional. The longer version can be