N3ds XL 11.2.0.35E here. after 100+ failed attempts @ soundhax and 20 something attempts @ steelhax decrypt9 finally booted on the last attempt @ steelhax.
MAKE SURE YOU WAIT AT LEAST 5 SECONDS AFTER THE SCREEN GOES BLANK, SOMETIMES IT SEEMS LIKE IT CRASHED, BUT IN FACT IT'LL LOAD DECRYPT9. SO...