Lego GBC Hoecken is a Lego Great Ball Contraption module based on Hoecken's linkage that converts rotary motion into approximate straight line motion. This module was inspired by: Whirligig By Matt Norman at https://www.greatballpit.com/ Zwarte 4 stangen (Black 4 bars) By Maico Arts [...]
Lego GBC Brickworld Ball Pump is a reliable ball pump module designed by Brian Alano. I have blue and red builds of this module and use them regularly at shows due to their reliability. The module is highly extensible and I use variations of it in several of my other modules. [...]
Lego GBC Balls are a quintessential part of Lego Great Ball Contraption, without them, it would just be a bunch of strange contraptions. As such I've recently done a comparison of Lego, non-Lego and UV balls and written my results up on the GBC Balls page.