This product contains all the photos scanned models of pollard willows with branches and twigs which can be bought from these links:
Pollard willow 1
hand-modelled branches which can be used with these scans
Branches are linked from the main file of branches and parented to the trunks so when you are moving trunk the branches will follow their parent.
My whole workflow is linked based, so these trees are made especially for this kind of workflow. you can easily append these linked collections using this method: