The Specifier

The Specifier uses InterUnit-UI, instead of WIMP, which makes it far simpler to use.
InterUnit-UI is a new design paradigm that has far better ergonomics than WIMP.

Most existing tools are not that simple to use (they all use WIMP).
Shapr3D is a recent tool that has been specially designed for ease of use.

The Specifier is being designed in sync with the design of a bicycle-trailer prototype.
Hence it's design is use-centric and domain relevant.
This also makes the design a lot simpler, since it starts with a narrow target.

It includes the ability to do some ergonomic modeling of the user of the design.

The Specifier uses a hexagonal grid as an underlying graphic design basis.
This makes its computational complexity a lot lower.
It is also designed with a minimal feature-set and resource usage approach,
since it is an introductory tool.
It does not have to rely on 3D hardware acceleration.
It will be very responsive on average PC hardware as a native app.
It does not have any server side execution components (like cloud based tools).

Most existing tools are either native, requiring workstation class processors,
or cloud-based, implying browser and internet-bandwidth constraints.