MOTM

I've been reading through Allen Strange's book "electronic music...."
Two modules he mentioned that caught my attention were:

1. Trigger Delay
2. Control Voltage Processor
    
    The trigger delay Is something I've found myself wanting for a while,
and the control voltage processor is a great utility module for inverting
voltages, etc...
    Have any other MOTM'ers ever had any thoughts about these? Anyone ever
put together their own trigger delay?

                Thanks,
                John