Solutions, answers & helpful schtuff:

Exploded view from the Parti di Ricambio. It's the lower most group of parts on the diagram.
- thanks to Charles for pointing me to this resource!

Excellent photos on Jordan's site:
Points 1
Points 2
Points 3
Points 4
Points Exploded
Advance Mechanism 1
Advance Mechanism 2

My original plea to the the List:

I've devised my Scrambler re-construction strategy...do the hard,
tedious stuff first that I know absolutely nothing about, leave the easy
stuff for last. I'm attacking the timing/ignition first, since it was
one of the parts I could accurately ID in the manuals while poking
through my 'heap o' stuff' (tm)

Information I'm looking for:
1. exploded & highly detailed drawing of the ignition/timing plate that
labels each component part.  Names of parts would be great, part numbers
would be fabulous..."pivoting thingy" just doesn't cut it for me when
describing my problems to y'all.
2. close up photo of the timing plate installed, with the point cover
removed.  
3. close up photo of the timing plate out 
4. I have 3 highly detailed manuals:  Clymer 160-450cc up to '74, Duc
OHC workshop manual, and a huge, coverless thing in 5 languages that
covers SCR, M1, M3, Sebring, Monza & 250GT - this one is fabulous.  It
explodes every component, listing their names and part no's right down
to washers.  The Bevel Newbie's heart's desire!  Only problem is that it
doesn't have the timing plate/ignition section dangit!  Is there another
manual I should procure?  Fully exploded,labeled views of stuff preferred.

Here are the bike specs in case they're needed: 1968 Scrambler, 250cc
bored to 350cc, with racing cam.  Engine model DM250M1 (left side of
engine), right side of engine bears engine number 00679 (yeah,
zero-zero-six-seven-nine) I have a sneakin suspicion that this isn't the
original engine, since the Scrambler engine numbers in the manuals are a
lot higher than mine (97,000ish), dunno.

If you're wondering why I need this info,  it's to help me figure out
the following things:
* (on the timing plate) the right hand contact breaker point is mounted
on an arm that pivots.  That pivoting arm has a short rod protruding at
the pivot point.  That rod has a small sheath of metal around it which
has light vertical scoring on its exterior.  Both the rod and its sheath
rotate with the armature when I pivot the arm.  Still with me?  The
sheath is sheared off on its upper right quarter.  The fact that it's
broken and scored on its exterior makes me think that something
clamps(grips) around this sheath, right?  Is the sheath critical?
replaceable? or am I buying a new timing plate? 
* does anything go between the 'Y' shaped felt block on the timing plate
and the shaft that the timing plate slides onto?  The line drawings in
my manuals lead me to believe something should be there.
* When I look in that hole in my engine where the timing plate goes,
there are two spring loaded arms that rotate 'out' when I turn the shaft
clockwise.  Neato! what is it?  

I should probably mention that if anyone in the Bay Area doesn't mind a
curious student, I would really like to watch you work on your single,
ignition and carb being a big, BIG bonus.  I will bring (legal)
libations of your choice, a good attitude and I  guarantee you'll feel
like the smartest Bevelhead on earth when I leave  :D 

You can email me off list as not to bore everyone else.  Did I mention
that I'm loving this?!?!  Buwahahahaha.

Your humble student~
Erin