New build help!

[TheIrishOx]

After getting my wood, i thought all my problems were solved. until I forgot about the shape of the bass. Single cut or double, exetnded cutaway, man could some one help me out on a shape. and to add to that 4,5,6, 7 string could some wise luthier be my yoda to my luke. Thanks

 

[Stumbo]

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[TheIrishOx]

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Neat site but i am looking to do my own original design but need help getting my creative juices flowing

 

[TheIrishOx]

I was thinking about a single cut design 4 string since i never seen one in real life, but single cut 4's and double cut 4's is their any sonic difference?