Tech Bases, Part 3

Now available: Bases for your more technologically-advanced miniatures, updated with better file names and more variety! The number of individual files is getting to be too much for Thingiverse to handle, so I am splitting this into multiple Things. This is Part 3.

Part 1: http://www.thingiverse.com/thing:81004
Part 2: http://www.thingiverse.com/thing:85260

Pattern 7: 25 & 30mm variants

My goal is to make a full selection of bases in 25, 30, 40, 50, and 60mm sizes for each pattern, w