The following information was received via email on Mar 4, 2011 in response to a request for an "X" delay for the K550:

"You can obtain approximately 18 seconds by using the smoke element from a K700W...RDK 33 Plus. Just remember this element does not use a delay spacer, as it is full length."

Karl Baumann Director of Operations RCS RMC, Inc. Cedar City, Utah