Or, possibly some other sort of time based sysex ‘choke’ that only allows a maximum of say, a fixed “framerate” of sysex messages that can be sent per second. 30 FPS ought to be enough for most applications when editing the parameters of an FM synth. If you do a quick sweep and send 99 sysex messages in 50 milliseconds, its just un necessary and overloads the tx81z.
so i guess this is going to need to be programmed from scratch.