We use a 4mil step tab and have no problems. We shoot as many as 500 to 550 first panels a week. Call Etchomatic at 617-893-2020 ( I think it's 893, Waltham MA) they will have this step wedge. Larry Frost Altron, Inc *************************************************************************** * TechNet mail list is provided as a service by IPC using SmartList v3.05 * *************************************************************************** * To unsubscribe from this list at any time, send a message to: * * [log in to unmask] with <subject: unsubscribe> and no text. * ***************************************************************************