Attached Link: http://www.fnol.net/~eannuzzi/carrara/Puck.zip

I am trying to lathe a roller hockey puck but I am running into a "symmetry" problem. Although I believe that I am creating the object symmetrical, the back side doesn't seem to have the proper depth. Any help/advice would be greatly appreciated. Thanks in advance. Steve zip file is 11K

Way past my bed time but I looked at your model quickly, take a look at the control points on both ends of the extrusion center-line path (pink middle one on the rightside view in free form modeler). One end point has a curve handle & the other doesn't. This may be your problem. I didn't have time to look further, hope this helps. PS- was this created on a MAC or Windows? I'm on MAC & had no trouble opening this file.-Bye

Thanks for looking willf... Yes, the scene was created under Windows... but... your idea doesn't seem to be the problem...

OK, I Think I know the problem. When you make a torus you should start on the cross section (back wall) and draw the upper 1/2 profile only & then go to the "extrusion torus" preset. The bottom line in your initial drawing would end-up as the center line in your part. It's a matter of changing your "distance to axis" thats somewhat confusing but you can always re-extrude it at a different setting or just drag those points where you want to. To make the rounded surface use the curved control points & use squared-off ones for staight edges (like the outside flat part that eets the ground). Its' really easy once you do a couple.

Thanks again... I posted a part II question today concerning the "squaring" of the inner parts of the lathe object.