the final ice code has no problem as far as i can tell from my tests. the h2o is fine and so the octpus chip. duo3 uses final ice as well with some modification: no dev mode, improved boot rate for v14/v15/v16. obviously something was made wrong when they modify the code. but they did much worse to the duo2gt. i've got no duo3 to try otherwise i will try to re-flash with a different ice code. i guess the duo3 also uses sx48 ?