Does DK Design actually design and manufacture?

DK Design operates like most other manufacturers. Try another question.

I believe DK Designs only uses the existing chassis.
(I own a Reference MK III )
I believe just about every manufacturer out there out-sources their metal work.
I am pretty sure Krell,Cary,Levinson,etc do not build their own chassis.
The Chassis most likely accounts for the largest % cost of the unit.
Have you ever tried to call up and order a new faceplate or top-cover from a manufacturer.
They can cost hundreds.near a thousand in some cases.
If you can get a chassis already built and put your dollars and cents into the internal parts and design,that sounds like a pretty smart idea to me.

The DK internals are/were designed and engineered here in the US.
The new DK Signature Version now has an all new pre-amp section designed by Legendary designer/modifier John Tucker.(Exemplar)
They use something called an "active load circuit"
I am not a designer,but,I believe this circuit allows the tubes to perform at 100% of their potential.
I have also heard that DK has or is working on "Statement"
unit that is intended to to best any amp in the world
regardless of price.
A hefty order,however,based on what the Reference does and what the Signature sounds like(I have a friend who owns one)
This may just be an obtainable feat for an intelligent design team that knows where to spend the money.

No Eldartford, if they appropriate existing designs and simply redbadge them or place them in a fancy-looking case, they are not like other manufacturers. So answer the question.