V-Cymbal Control is an upgrade added to the TDW-1 Expansion board that provided 3 zone triggering for the CY-15R ride pad.
If you have a TDW-1 without V-Cymbal Control, Roland still offers this upgrade and it can be done free of charge (less shipping both ways) by sending the TDW-1 expansion board (only) into our service facility in Ontario California.
If you'd like to have the V-Cymbal Control upgrade added to your TDW-1, please obtain a Return Authorization number (RA) by using the online service request form on our site here;
http://www.rolandus.com/support/service_request/
Additional shipping details and instructions will be provided once you receive your RA#.