Python/Max API skinOps help

Hi folks new here so please excuse me if i posted this under the wrong board.

I am very new to python started looking at it hoping to get away from maxscript in max 2016.

been doing some simple stuff see how python/Max is handling different maxscript methods

Ive added a skin modifier to an object but cant get a grasp how to access those wonderful skinOps that via ms you must be in max modify mode have the skinModifier selected to populate the bone list.

all the skin properties are easily accessible

Import MaxPlus

def add_SkinMod(node):
skmod = MaxPlus.Factory.CreateObjectModifier(MaxPlus.Class Ids.Skin)
skmod.ParameterBlock.bone_Limit.Value = 4.0
node.AddModifier(skmod)

pretty straight forward but now for the brain bashing bit of populating the mod with bones.

Any help would be greatly appreciated

Thanks in advance