Hey thanks -guys- Didn't mean to worry anyone.
I've been watching and worrying to get my "final/Final modeling done on my IRS.
I realized last weekend - Just before I cut metal -- That my new idea - funky- Upright wouldn't accommodate my brake calipers.  BUGGER!
So redesign. 
And then re run the numbers for RCs front and rear,etc, etc. 
And then,  I started working with CASIM.  A pretty cool piece of freeware.  You do your inputs and it does a simulation and includes some 3000+ cars in its database!  I'll do a posting on the software thread - and pull together my bits ad a thread on that design and build.
Also another REALLY COOL book from Allan Saniforth.  I recommend to all: Race and Rally Car Source Book, A D.I.Y. Guide to Building or Modifying a Race or Rally Car.  Like the title says -- that's where I'm at.    Even though theer is only one really Solid Chapter on Suspension & Steering - the heart of the matter, it covers a great range of other details.  I'll include a number of quotes from this "text"when I write my IRS White Paper.

Thanks again for "worrying"--  BTW - I've enjoyed the videos and the Jag discussions too..

Cheers - Jim