I have an AC66U_B1 that has been sitting on a shelf since I got the AX86U almost 2 years ago. I would like to bring it up to the latest Merlin release (it's currently on 386.1_2) and then sell it. Can I just connect it to a LAN port of the 86U and do the setup? Or should I plug it directly into the ethernet port on my computer? Question 2: Is the jump from 386.1 to 386.9 to big? Or should I update in a couple of intermediate steps first (e.g., to 386.4, then 386.7)?