Glad you like it – I'll try and be gentle ..
You won't be able to do what you want without some extra MIDI wizardry (you can make the first one control the second, but the second won't then control the third – needs a real pedal to send).
But, if you can make cables (or know someone who can), make a 3-way Y-lead, so your pedal will plug into all three – this should then work as you hope.
