Synthesize & Family toolkit are one of the most important tools to work with in Revit, especially to eliminate time consuming and repetitive tasks.
Those toolkits are developed by us, based on your suggestions, problems, and solutions.
In this blog post, there are lessons to help you solve all the problems that you might face with the installing or updating them in Dynamo.
Dynamo Player Browse Path :
C:\Users\<YOURUSERNAME>\AppData\Roaming\Dynamo\Dynamo Revit\<DYNAMO VERSION>\Packages\Synthesize toolkit\extra