I have been reading about your updates with great interest.
I just got a 1988 8V92 40 ft Newell with tag (coach #179)
a couple of weeks ago.
I am learning a lot from the forum.
I previously purchased a readout system From Garnet (See Level II)
for my fifth wheel and was able to read tank levels in increments as small as 3%,
the sensors just stick on to the tanks. Multiple sensors can be
stacked for taller tanks.
How bout posting in the new members welcome section and telling us about your coach, how and why you ended up with a Newell, and attach a few pics.
Richard Rhonda Ty and Alex Entrekin
1995 Newell # 390 DD Series 60, Allison World Trans
Subaru Outback toad
Often wrong, but seldom in doubt
Rhonda's chronicle https://wersquared.wordpress.com/