No 'user' input on this thread...so I'll make a few notes.
DL'ed the xfce image and gave it whirl on my 3b+. Just using the sd card for the system. No USB drive connected.
I DO NOT like the 'heartbeat' LED blinking, would like the usual activity that sarpi does. Tried poking the net for an answer on how to set it back, but I don't seem to be asking the right question.
Seems the system crashes after about 10 minutes of runtime...I boot it up and then open some web pages and then go do some other things around the house...come back to the pi and it's locked solid. No display, but the heartbeat is still blinking. No IP reply from any pings. Need to power cycle to recover.

Logs don't show any issues. Crashed in the middle of creating this post!
Looking into hotwo update the rootfs...in time.
I appreciate someone building 64bit for the Pi 3. Thanks!