Hi all, I haven't used ACAD since R12 so I'm unaware of the latest capabilities of all the current varieties. I am looking for a software to do layout of huge machines like printing presses that have many rollers and paths that the paper follows. In the design stage I would like to use a 2D software that is efficient for the 1000s of lines and circles that define the layout. I have tried using the sketchers of several 3D modeling software but find that these sketchers don't like so many lines in one sketch and I find that multiple sketches are rather inconvenient. An additional problem with most sketchers is the inability to color code the lines. My question is, what is a good software for this 2D layout phase. The ideal 2D software would allow me to move an arc and some tangent connected lines and hold the tangency. Does anyone know of a software that can do this kind of a "tangent maintained stretch" without the problems of typical sketchers? Any suggestions appreciated Thanks JTS