Hi Can anyone who owns a Boss PH-3 tell me what happens when you use the external footswitch to control the tempo? Does the tempo of the rate change instantly or is it exactly like when making tempo changes via the treddle, in that you have to depress the pedal for 2 seconds before it enters tap tempo mode? I am looking for something that lets me change the rate of phase on the fly, to use for reggae. Maybe there is another pedal that does this too? that.