Would love to see this done for the Spark amp as well, this level of hardware hacking is beyond my skill set.

I recently built my own Multi FX app/plugin (https://guitar.soundshed.com) and am looking for ways to squeeze it (or a version of it's signal chain) into commodity hardware as replacement DSP signal chain.

Unfortunately there were no firmware updates for the THR10c, so the only way to get the firmware is to dump it from the device.