Subject: Blackwood with a void

A long time ago, I learned that the responses to 
Blackwood when I held a void were:
     Aces
     ----
      0      	Ignore the void
      1      	Bid 6 of the void
      2      	5NT
      3      	Show one ace, then raise 
      4      	Check the backs of the cards
That was before Roman Key Card Blackwood, and it
seems inefficient to me, especially if the location
of the potential void is known.  I'll also note that
some play 5NT = 1 or 3 and 6x = 2 or 4.  Joy.

I hate to say it, but yes, we still have some auctions
in which we cannot distinguish between void and singleton
splinters, for example, 1S-(2C)-4C.  

So, after a major suit opening and an identified shortness,
how about the following scheme.  Yes, I know we can do better
with relays, but this is very simple and an improvement over
the old stuff.
     Keys
     ----
      0     	Ignore the void
      1/3 no Q  5NT
      1/3 w/ Q  6C
      2/4 no Q  6D
      2/4 w/ Q  6H  

Ed plays this method, regardless of whether the potential
location of the void is known.
      5NT = 0 or 3 keys and a void
      6C = 1 or 4 keys + void
      6D = 2 without
      6H = 2 with

The advantages of his are: 
      (1) 1 and 3 aces are different bids
      (2) It's symmetric with normal RKCB
The advantage of mine is:
      We get to start looking for kings 
      a little lower.
I'm not sure which is better.

In either case, what are the followups?

Over Ed's, obviously, 5NT-6C and 6C-6D are queen asks.  

Over my idea, I don't know what's best; 5NT-6C ought
to be some sort of king ask with the void suit replacing
the king of a suit hard to bid (usually clubs).  6C-6D or 6H
probably ought just ask for the appropriate king or show it,
again with the encoding that if it's a known void, then it
is the lowest unbiddable suit, here, clubs.  6D-6H just 
notes the presence of all the keys and invites seven,
assuming the trump suit is spades.

I am sure there's more to this.  Anyone else got any ideas?
			--Jeff