I'm still struggling with the ERC/JCM for the conforming clothing I tried to make for Antonia.  Below list my process.

Making JCM

1. Pose the figure with conforming clothing at a pose, for example, Left Thigh Kick at 30.
2. Export the part(s) of figure that may be covered by the part of the conforming clothing as OBJ.  It will be used as a reference.
3. Export the part corresponding to the bone of the conforming clothing to be morphed, for example, hip2, as OBJ.
4. Import the OBJs into a 3D modeling software, in my case, it is Blender.
5. Modify the part of the conforming clothing to be morphed.
6. Export the modified part as OBJ.
7. Extract the "v" lines from the original OBJ and the modified OBJ of the part morphed.  Convert it to CSV file.
8. Import the CSV to spreadsheet.  So that sheet1 contains the original values, sheet2 contains the corresponding modified values.
9. Setup sheet3 to contains the deltas.
   Example:
   d 0        =Morph.A1-Base.A1 =Morph.B1-Base.B1 =Morph.C1-Base.C1
   d =b1+1    =Morph.A2-Base.A2 =Morph.B2-Base.B2 =Morph.C2-Base.C2
10. Export the sheet that contains the deltas to CSV.
11. Use the information Cage provided in Antonia-121_thighERC.txt to create the morph channel.
12. Edit the deltas CSV to make it into the deltas section.

I wonder if I'm doing the right thing.  Any suggestion?

odf, I wonder if which angle I should pick for the pose in my step 1 will provide the best result.  Should I pick Left Thigh Kick at -60?