@RedBlueGreen Thank
@AngelSL for their work on this, too. They took some of the stuff I transcribed from Rai-chan's IDB for their original flasher, added it to what they got from their research on the r4isdhc.com cart, and has much cleaner code as a result. (The reason why writing didn't work on the builds I provided was because I removed one sanity check but forgot the other sanity check, which I didn't know was present.)
In general, I'm glad to see that unbricking works now! Mainline support for these carts will come as soon as injection is figured out.
I'm not surprised. *of-couse* there's a curve-ball somewhere. Shame.