[sdiy] Kit production advice

[peter edwards]

I'm gearing up to release my first PCB and kit by the end of this  
month (oh boy!)
I know a lot of folks on this list design and sell boards and kits. I  
would love some input from seasoned board/kit sellers.

  The whole project is open source, but I am also going to be selling  
boards and parts kits.
It's for a 4 voice drone synth called the DroneLab.
You can read about it here:
http://casperelectronics.com/finished-pieces/drone-lab/drone-lab-v2/


-What is the standard price mark up on boards and parts?
-How do you calculate the value of R&D time? I figure that doesn't  
factor too heavily into the price and you just recoup over time?
-How do you sell your boards/kits? I have a website and plan on  
contacting this mailing list and the electro-music forum but would  
love to hear more ideas.
-Where do you order boards from? I'm planning on using expressPCB and  
ordering boards 50 or 100 at a time.
-Any general words of warning or advice?

ALSO

I'm feeling pretty anxious about committing to the current design.  
Once the board is made, there's no going back! (until the next  
revision I guess).
The current schematic is posted at the link I above. I would really  
appreciate any input on the design.

Thanks,
Pete Edwards
casperelectronics.com