Why develops an alternative to the baseline BeO hybrid by a bridge of
PG/Be with a Kapton hybrid.

Advantages: 

(1) Savings in radiation length (see the tables by R.Apsimon presented
    at the Santa Cruz meeting), maximum difference by 0.15% Xo(with 0.5 mm
    Beryllium) in the 1.3 % Xo of the Barrel module (overlap included)

(2) Good thermal properties in hybrid by PG, comparable thermal
    properties by Beryllium
        
(3) Good electrical conductivity by Copper (about 3 times with an
    equivalent radiation length of Gold)
        
(4) One piece construction of hybrids and Kapton cables (i.e.,
    wraparound and pig- tail), which has two advantages:
        
    - the width of the hybrid is not limited by the width of
      connections of the hybrid and the cables,
          
    - eliminating the soldering process of the hybrid and the Kapton
      cables, which saves the assembly cost/man power and the vulnerable
      connection of the Kapton soldering (for any bending near the 
      solder may damage the Copper traces)

(5) Large cost savings in Kapton hybrid than in the thickfilm ceramic 
    hybrid