Okay, I'm trying to model the frame of our robot in inventor. We are using 30x30 IPS extrusion, so I'm using the 30x30 drawing from Ed Spark's library.
I "Add Component" to my assembly four times, 3030.ips, one for each side of my rectangle (29inx35in). Here is the problem: When I extend one of the pieces (with edit: extrude) the other three are extended too! I can disable "Extrusion 2," but then all four pieces are the starting length!
I *can't* figure out how to get different lengths in there! I had some one tell me to just make seperate parts (.ips) of the right length. This seems really really inefficent to me. There has to be a Better Way! Does anyone know of it?
It moves so smoothly because it is magic. - dtengineering [more] 
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