Hi Bikermouse, Some of the "hill climber" engines had gears as well as wheels because the incline was so steep, they need rack and pinion gearing to get up the hill. I think the Monagahelia railway (in Pennsylvania) is that type of railroad. It's a short run that goes up a mountain, and of course in Switzerland, this is often used. Also, did you know that many of the modern steam locos and even deisels now a days, carry large quantities of sand on board? Turns out that a steel wheel on a steel track doesn't get a lot of friction and can slip quite a bit. They have special sand nozzels to spray sand under the wheels to give the engines better traction. One would think a locomotive of several thousand pounds weight would have plenty of traction, but when pulling a load considerably heavier, they need even more grip. Also, another trivia tid bit. Deisel locos don't use the deisel engines to power the wheels. The engines run generators, and the wheel power comes from electric motors. There was a self powered passenger car call a "Budd" car used for commuter runs. The deisel engines were on top of the car (thus allowing room for passengers.) I always wondered how they got the power from the deisel to the wheels, until I leanred it is all done electrically. Just some more useless trivia. MACS don't usually come with MSWord bundled, so I was speaking as a MAC user, but the story is similar for many programs. WordPerfect, before they went bankrupt umpteen times and landed in Corel, used to have an interesting policy. They figured out that upgrades were a cash cow, so there was once a directive (I can't prove this, I heard it from a WP techie) that WP would be upgraded every quarter, and the upgrades were to be sold to consumers, not given away. This was in the early 90's I believe (I can't remember for sure...the company I worked for was being squeezed by it because they had bought WP across the board). One of the big issues was that the upgrades were really bug fixes and did not add much to the program. This was again, on the MAC side of things, and for all I know, it could be urban legend. But the company did buy annual upgrade packages from them until they finally said "enough!" and moved to Microsoft Office. I always thought Bryce was a 3-D program. Unless you are referring to a more advanced type of 3-D program, such as Lightwave that allows much more control over shapes and so on. I have Strata 3-D Pro (a MAC product) which supports OBJ and DMF, DXF and other formats. So, when I need a special shape for Bryce, I create it in Strata and then import it into Bryce. I am more comfortable with the Bryce interface than the Strata way of doing things, though Strata is a good program. I just haven't gotten comfortable with it. See ya!