Control devices and kits of components of control devices are provided.
The subject invention also provides systems for designing control devices
and/or kits of components of control devices. A system user can provide
data about an end user to an expert system via a user interface, and the
expert system can use the data and a method for selecting appropriate
components to design a control device and/or kit. The control device can
be a self-referenced control device and can include a controller and a
wearable interface.