Hi Peter,
Is OSC something that you can implement into ST4
I currently use Bome Midi Translator Pro to send midi from ST3 to the translator over a network to my MacBook Pro
This then outputs via WIDI MASTER to my MR18 to automate Stereo Delay and Reverb pre delay & decay
If you could add OSC it would negate the need for Midi Translator Pro to convert the midi and the need for my MacBook