I tried copy and pasting the link and managed to get the downloads.
I tried .17 on my 3400 but the process just stops after a couple of blue bar cycles
I tried .17 on the 72xx but I get Error determining new default boot partition version.
At the moment I have .16 on the 3200 and .15 on the 72xz, the paritions are not bootable at the moment. Trying to update from 6.3.1.7
Maybe some smaller steps are needed?