To Rob's issue with the split switch.   I think you are saying you can't
have the alt on without the battery.   You can convert those switches
to fully independent by cutting the little plastic tabs that interlock them
off the back.   I didn't actually do that to my alt/batt switch but I had
to double up a couple light switches so I did it for them.

Yet more feedback for John:
0) pfd:   I agree with Craig.  Looks like you need the pro if you really
want to be ifr.  If I had it to do over again I would probably get a
3-screen Chelton Pro.  By the time you get done with the airplane,
the little you save by not doing that doesn't really make sense.
1) remote boxes: think about where you are going to put all the little
boxes before you finalize your panel.   e.g. get a full list with sizes and
weights.
2) weather, traffic and terrain.  useful to have a 3rd display for that so
you don't have so much clutter on your nav display.   cfs is most flexible
and I like their dial kind of engine display.
....but for the same money you could get mx200 which also has charts.
maybe cfs is just as good at all that.  I'm sure Rob will say.
3) engine display. I'm not familiar with that product.   I bought a grt.
when I got into I discovered basically this does become your idiot
box and you end up wanting to run all your sensors for alarmable
events into it.   GRT has support of many inputs beyond their
engine monitor, which is nice.  might be worth mapping out all your
alarm conditions and make sure you are happy.  The thing that got
my attention on the GRT was their engine trace mode that gives you
recent history.  who knows how useful that will be.   That said,
I hate bar charts.  I think CFS wins easily there.
4)   audio panels - lots of wiring options for cell phones and external
music and switches.   suggest downloading the install manual(s) at
ps avionics.  They are pretty short and to the point but show all the
issues.
5) backup power.   do you want a supplenator?   it's a different backup
philosophy so it might change how you do your backup wiring.  also
includes volt/amp and vacuum display.  contact
gami for details.   while you're there, will you want PRISM some day?
also may affect your backup power planning.
6) de-ice.   they are all different in terms of electrical requirements.
options are a) northcoast.   sounds like it has installation issues and
no track record since no one has installed on IVP yet.
b) electro-expulsive. installs nice.  I haven't seen any LIVP inflight
experience published.
c) tks.  great track record but the panels don't match the airfoil
7) failure modes.  Is this flyable without the CFS?   I'm no expert
but I did do some partial panel in the sim once and found not having
a DG disturbed me almost more than anything else.   I would tend to
have AI, DG, and maybe even VSI right there together.  Maybe move
cdi to the copilot side and put airspeed there?
8) AOA?   there is still dispute among living pilots if these
are useful.   personally,  I wouldn't consider not having one in a IVP
9) what happens when you need more switches and breakers?
A/C, lighting, wing tip landing lights, dimmers.
seems like you REALLY wanted those switches
out of the way but that may cause an extra reach for some stuff.
10) speed brakes:   I ended up with bill maddox speed brakes just
because precise flight version 1 pockets don't fit the current precise
flight
speed brakes.   After looking into it I discovered more reports of
precise flight in flight failures than bill maddox.   Not a very good
statistical sampling but ironic.  Anyway, the switch works differently
(hold until you get what you want) vs. precise flight (flip it and let
it do its thing).
11) storm scope.   Most people don't think they work in LIV"s and
some people think they are worthless.   I bucking both opinions.