All is working fine ..Yes, since you are on a 378 base, you should be able to load directly via the gui. Follow up with a factory reset.
Again, since it's 378, you should be able to load it directly via the gui. Again, follow up with a factory reset.
Did upgrade the media bridge (68p) first - without any problems .. even airprint is working now in media bridge mode.
I did not made a factory reset either .. 8TB harddisk works fine on usb3 .. all is fine.
The main router (68u) was running on 28L before. Switched to 29E2 today .. also without factory reset.
Just had to reformat jffs again .. all is working like on L releases for me.
Big thanks for all your work !