virtual Bool_t GetSectorMountingPoints(Int_t index, Double_t &x0,
Double_t &y0, Double_t &x1, Double_t &y1) const;
// displace the staves on the carbon fiber sector
virtual Bool_t GetSectorMountingPoints(Int_t index, Double_t &x0,
Double_t &y0, Double_t &x1, Double_t &y1) const;
// displace the staves on the carbon fiber sector