Tech Bases, Part 1

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 1.

Part 2: http://www.thingiverse.com/thing:85260
Part 3: http://www.thingiverse.com/thing:85262

Pattern 1: Several 25, 30, 40, 50 & 60mm variants
Pattern 2: 40 & 60mm variants
Pattern 3: 40mm