What a great idea,just set out a few parameters beforehand for the basics like body shape,neck taper etc.... then just have a vote on top woods  and the other major considerations,don't over complicate it all,then let Alembic just decide on the finer details.
 
Everybody who wants to take part send in your money and off we go.For $50 or $100 i think you may get a lot of interest,i for one would certainly love a custom build for that price even if the wood etc wasn't what i'd choose if i were having it made for myself.
 
It does not matter if you do not win,but there is a chance that you may win,exciting! Pop every participants name in a hat and then just get Mica to pull one out and BINGO some very lucky so and so's got a brand new bass Superb!

Guys,
the estimate for my DDW is around 26K.
And of course, I would like to see this design (my idea) in my hands.... :-)
 
Oliver (Spyderman)

How about the Tribute or small standard body Double neck?  A 6-12 configuration.  Nothing too fancy, just a simple and clean Double Neck guitar.  Purpleheart body, Purpleheart and Ebony necks, Coco Bolo top and back bookmatched to center.  Continuous wood pickup covers, truss rod cover and rear plates.  Solid Un-chambered body.  The most simple electronics (like the EDS-1275).
I'm sure it would be well below 26K.
Something with more general appeal than the DDW.

I think that's an awesome idea about the forum based raffle type thing.  I would never assume this double neck up like that.  I just think that bass is a great thought.  I know it would be very expensive and I'd love to see it in Senmn hands not to mention Rob's work put to good use.
 
Like mentioned above, it would be great to see one bass go up once a year as kinda like a raffle for the enthusiasts here.  Some very cool one off like this DDW that has gotten us all excited and talking about it.

Oliver,
 
At 26K, I'm quite confident that your design idea is safe.
 
I personally welcome and invite anyone to build my ideas so I can someday acquire them second hand...or maybe third...fourth...fifth......  until I can afford it.......
 

Oliver. That estimate is ...... I can almost hear your wallet screaming. ;-)
 
How do you like my computer wallpaper?
 
 

Rob buddy,
yes I have to save hardly.
Could you send me that picture?
I only have the small one from this site or do you have a bigger one you could me (also without the background)
 
Oliver (Spyderman)

Here is the image I've used as background.(sorry for the large size) And a closeup of the pegheads, showing how much there is to be done on the strings.  

 

Rob,
thank you so much.
 
Oliver (Spyderman)

Oliver,
 
I look forward to seeing this image at the end of a future Featured Custom page.  Mica will have one heck of a story to tell about how this project was born!
 
Best wishes.........DO IT!!!!!
 
Rami

A little test, 2 strech upper horn.
 

Guys,
I think there will be no need to stretch the upper horn and to destroy the design. The single DW balances more than perfect, and with two options of back strap pins and the bigger lower horn (much bigger than the normal DW lower horn to fit the master vol and pu selector) there will be no need in doing this. It WILL balance perfectly, believe me.....
 
Oliver (Spyderman)

If not. Here are a couple of renderings of the two different shapes.  

 

Rob,
sorry, as said before. Looks not good and destroys the design.
Just my opinion.
Plse leave it as is.....
Oliver (Spyderman)

OK. It's your bass.
How do you like the logo on the pickups?