Thumbnail fixed. Thanks to this:

http://forums.keenswh.com/post/black-workshop-thumbnails-how-to-fix-windows-7-6850299

Anyone know why the thumbnail is black?

Increased accuracy of particle cannon.

Paradoxically, the confinement fields were pushing the ore paricles off target more than they were helping to keep them on target. They have been removed and more acceleration generators have been put in their place.

I intend on creating a test world demonstrating different designs.