@anotherthing, DS HomeBrewOS is the Ace3DS+ cart. I'm currently using my Gateway Blue card for playing some of my titles, compatibility is great but games with AP checks need patching.
No, I believe it's a yellow shell one. I watch that DNA gaming guy sometimes and he recommended a specific R4 cartridge. So I got the one he recommended, and that XXX in 1 was the exact one he recommended.