Is this possible?

Lots of long threads related to doing MTP on Teensy 3.5, 3.6 and 4.

I see the "MTP Disk (Experimental)" USB Type in \Tools
Seems like I'd need to edit the USB types file and the boards file to add MIDI to MTP Disk.

I'd love this as a way to transfer data between end-users' PCs and my USB-connected Teensy device.

Is this possible, mature, non-experimental yet?

If so, is there a best thread to walk me through it?