It looks like the I could create quick mockups for the ramps if only I could calculte the radius of a thought circle made of MR ramps. Here's a triangle with a 90 deg's angle AB and the hypotenuse c equlas the radius: a=640 b=c-120 c=<unknown> That (...) (21 years ago, 26-Aug-03, to lugnet.cad.dev)