http://www.zwsoft.com/forum/viewthread.php?tid=946 Hi All, I am modelling a carriage system that runs on a tubular track so it can ultimately do a combination of horizontal and vertical curvature. The problem is trying to set up the assembly to; a) Align rollers to the tube b) align so that the rollers follow the curvature of the track I am attaching a picture of part of the assembly. Also a file of the tube and the rollers. I hope hte file is complete enough for you to use. All the parts are in it. This is a very simplified version to figure out how to do this. Any help appreciated including VX(oops) ZW3D staffers! Cheers mudcrab 2011-08-31 20:44:25 http://www.zwsoft.com/forum/viewthread.php?tid=946&pid=5273 Hi Tony, the zip files seem problematic. They show as loaded when I edit but not once posted? Attaching full sized file ~8Mb as well. Cheers mudcrab 2011-09-04 21:52:18 http://www.zwsoft.com/forum/viewthread.php?tid=946&pid=5272 Dear paul, Thank your for your sharing, it souds great. but i am sorry, would you mind uploading the attachment again, since I can't download the CG-0043 CopyVX2.zip file. Tony 2011/9/2 tony 2011-09-01 21:12:46