DCC Sound Sync Cams

[TheSnapper]

Just discovered these from NG Trains/EDM- they look interesting:

http://www.ngtrains.com/Pages/Synch_Cam/soundsynch.html

I've asked if they might do a Clip On Synch Disc-4.5 for off-beat 3-cylinder locos,to fit my Sang Cheng V2.....

Tim