In my constant search to expand the DS capabilities, i was looking for something that let you plug in two slot-2 expansions in at the same time. I needed the functionality of the ezflash 3 in 1 and the storage space of the MMD. The only information at all i could find on this was the gamester game changer. While it was listed as only being for gba SP (seemingly because of the form factor) , i figured it was pretty cheap i could get it, take out the insides and think something up. When i did get it, this did not seem very hard to do. Inside there was a (rather large) PCB with the three input slots, a switch wired on the side, and the output slot, attached by a short fat ribbon cable. although i have not found a reliable way to attach it, i currently have other problems. It seems to be missing functionality somewhere, somehow. For example, i can use the rumble on the 3 in 1 and i can copy things to its RAM, but i cannot actually boot the gba games from it, it freezes. with the MMD, i can vied the files with dual slot browser, but i can not launch moonshell from it. (i can if i take it and plug it in the slot by itself right after) This baffels me, arnt the game slots of the GBA-SP and the slot2 of the DS the same thing? Why would this only be partially working? Any way to make one on your own? thanks for reading.