Brian:

I was hoping someone had a great solution, but here's a brute force method.  In assembly room duplicate the piece you have (edit>duplicate).  Manually place the new duplicate with one end at the opposite end of the original piece.  When you duplicate the new piece again, it should duplicate to the end of itself.  Repeat until desired length is achieved.  If it has to be really long, try stringing four together, group them, then duplicate the group.

I'm sure there's an easier way, but that's what I'd try.

Klebnor

Lotus 123 ~ S-Render ~ OS/2 WARP ~ IBM 8088 / 4.77 Mhz ~ Hercules Ultima graphics, Hitachi 10 MB HDD, 64K RAM, 12 in diagonal CRT Monitor (16 colors / 60 Hz refresh rate), 240 Watt PS, Dual 1.44 MB Floppies, 2 button mouse input device.  Beige horizontal case.  I don't display my unit.