After watching video clips I went and bought an ultrasonic cleaner. Looks about same size as one shown. Tried it out this afternoon and very pleased with results. Benefits as I see: Only 12 minutes to clean 50 cases. Primer pockets all cleaned out. Drawbacks: Rinsing and drying cases although this didn't take much time or effort as put in airing cupboard to dry out. Thanks for help, this does all I need for now.