How about 3560 SgMy unit Hwid 1521?
Edit :: I am downloading.
Edit2 :: Pack number1 is original US 3597 v2.60 firmware hwid 1603.
I already tested with my 35xx 3 hrs before this thread started (SgMy hwid 1521) and rgn file not flashed via updater.exe
I didn't see "Loader" on screen. I disconnected from updater and pressed start botton for 10 sec and go back to SgMy.
Maybe I need 35xx with US hwid.