I use mididesigner to send patch changes followed by a few control settings. Sometime my settings don't "take" because the synth is still working on executing the patch change when the message arrives. Not sure why it doen't que it and execute it when it's ready but it doesn't. Using the batch throttle gets it to the point where the 2nd one sent after the program change works but not the 1st one. I think I would quadruple the max or something like that. What by the way is the current maximum in milliseconds?