Cyclone Marble Machine drive cap for Lego Mindstorms

I printed @mroek's Cyclone triple track marble machine and loved it. However, being rather lazy I wanted an easier way to operate the marble lift. So I replaced the drive cap with my own that has a Phillips' indentation at the top, thus allowing a Lego Mindstorms motor to drive it with ease.

mroek's Cyclone triple track marble machine:
http://www.thingiverse.com/thing:1340784

*** IMPORTANT ***
Because the original STL for the marble machine was too large to print using my Dreamer, I prin