\section{General Detector .....  {\small [JD]}} 

{\it
There are $n$ proposed detector concepts which are discussed in next
sections. 
Here, the following 3 points can be discussed commonly.
}

\subsection{Mechanical structure}

{\it
8+8 large-small layout, total space in $z$ and $R$.
Support structure, accessibility, ..
}

\subsection{Radiation shielding}

{\it
The same as now, or possible improvement of radiation shielding, ..
}

\subsection{Alignment}

{\it
Requirements, target figures, important comments which can be made 
independent of the detail of detector layout.
}

\subsection{Readout electronics}  

{\it
Issues common to all concept.  Around ROD.
}

\subsection{DCS, services, }

{\it
}
