I've been buying from Happ Controls for almost 15 years to make interfaces for museum interactives. Their products will stand up to severe pounding. I've been using the same trackball with my regular PC for 12 years and I've only had to clean and oil it once. When I took it apart to oil the bearings, it looked like one of the rollers had worn a bit, so I wrapped a piece of Scotch Magic Tape (R) around the shaft, and it has been working fine for the last two years. Bob Date: Sat, 06 Dec 2003 21:59:36 -0500 From: "Richard A. Cini" &lt;rcini(a)optonline.net&gt; Subject: RE: Space Invaders returning to arcades... I don't recall this being mentioned before, but I've found that Happ Controls (http://www.happcontrols.com) has everything you need to build a proper MAME setup. The buttons are reasonably priced. The trackball will give you a bit of heartburn. The spinner is a must-have. Don't buy a coin door from Happ. You can get them on eBay for about $30 + shipping. <snip> _________________________________________________________________ Cell phone ‘switch’ rules are taking effect — find out more here. http://special.msn.com/msnbc/consumeradvocate.armx