Weight painting using Auto Rig Pro on Blender 2.8 I need help with painting weights on a rig made with auto rig pro. I cant find the correct vertex groups for the bone I'm painting. There's an arm twist offset and an arm stretch vertex groups to paint on. Which of these is the arm really?

Theres an arm twist offset vertex group


Also an arm stretch vertex group


Here you can see the fk controller driving the left arm bone


So which of these is the correct vertex group to paint on? I see the fk controller for the shoulder is driving the c_arm_fk.L bone, but it doesn't show up in the list of vertex groups for the weight painting on the arm. This is my first time using auto rig pro and I'm used to rigging in Maya.
If I am correct, You are supposed to weight paint based on the bones that are in layer 31. It should look like this when you view it.



Artell has provided the character Mike in his manual for weight paint reference.You can check it out in here : http://lucky3d.fr/auto-rig-pro/doc/auto_rig.html#how-to-paint-the-weights

I hope this helps