Yes I have... I used the 1608@1616 hack on my DUW1608 drive, and while fairly successful, it resulted in an "unreliable" drive... luckily, I was able to reflash my drive using the official Aopen r1.08 F/W executable. I encountered no errors or problems reflashing the drive using this method.
Secondly, as soon as the Aopen DUW1616 r1.01a F/W was made available, I decided to "try" it on my DUW1608... the worse that could happen (imo, anyway) was an "invalid drive/target" error... plus, the drive was fairly inexpensive to begin with, so "what the heck"... I selected "AOPEN DUW1608/ARR A080", and hit start... it flashed without error, and it is now detected as "AOPEN DUW1616/ARR 101a". I have yet to encounter any problems or issues within my use of the drive.