[A/S] So MANY Questions! Where to start?!

["Tom B." <gringo9779@xxxxxxxxxxxxx>]

Having "shown off" w/ my repairs, I'm honor-bound to display my 
ignorance. :> [=BG =big grin]

What does that big 5-digit number on front & back mean?!

This No-Gray-Tank was...a surprise.  I'll bet SOMEONE has come up w/ 
a nifty-jiffy way to add one [he says hopefully...]

I'm in need of those hand-turned bolt-downs which were used both on 
the rear compartment that holds the septic valve'n'stuff, and on the 
Solar Guards [of my vintage; I see others w/ a diff. type latch-
down].  ANYONE?

W/ the single battery tray in the "One Stop Center" of older models, 
has anyone figured a really good location for an add'l. battery?  {I 
like under the front couch - hey, all modern batteries are SEALED, 
right?] [rolls eyes] :>

I was...stunned...at the replacement cost of the plastic lens covers 
for the 4-bulb overheads.  25 bucks? -yer kiddin', right?!  Holy 
smokes.  Or is there a cheaper source?

In addition to the water-purifying filter, I have an addl. smaller 
one -just a metal screen inside- between fresh tank & pump.  Is that 
for sand & sediment?  What's the clean-out process & interval?  [I 
know some jokester just HAS TO reply: "When It Don't Pump Water No 
More!!!"]

Do these acrylic rockguards really, REALLY guard against rocks?  
{W/o breaking, I mean.]  How about in [sigh] freezing weather?

Also re: freezing weather [I admit it, I've become a wimp about 
solder-repairing copper pipes :> ] - if one uses catalytic or 
electric heaters, instead of my holy-smokes-dang-antique-still-works-
furnace, does that endanger the pipes that run from pump down to 
bathroom at end of trailer?

What's the "big" SignalStat built into alum. skin on the starboard 
side for?!  {i KNOW it's a durn light!  I mean: what function was so 
important, to build it INTO the skin?]

My A/S says "Land Yacht" one place, "Sovereign" another, 
and "International" in still another.
  C'mon!  What is it, REALLY?!
:>

More Dumb Questions Surely To Follow, :-)
Thanks for your patience.

Tom B., Mountainair NM