I'm looking for a flashcart that will let me play my DS roms on a 3DS, and I don't care about support for 3DS games. I only have experience with a CycloDS Evolution, so I don't know anything about different carts and firmwares. I know that the iEvolution works on the 3DS, but it's much too expensive. What flashcarts are relatively cheap, easy to use, and will work on the 3DS? If knowledge of how to use different flashcarts is required, a link to a tutorial would also be appreciated.