Chuck, Regarding respresenting a circular feature in IPC-D-356 specifcation, leave out the 'Y' dimension, this is generally accepted. Please note that IPC-D-356 is currently under review by the IPC-D-356 Task group and will probably be rereved to include trace data and other infomation such as via in smt pads... Jeff Garland Lavenir Technology Inc. [log in to unmask] 603-431-6279