Hi there, 

We have already got a functioning ZOHO CRM Python SDK instance running to push and pull data to and from a Third Party app. However, we also want to make some interface changes, ie. custom buttons and modules to the ZOHO CRM interface - Looks like that would need to be done through an Extension with Sigma. We want users to only go through the Marketplace application for the app once.

How can we combine both the SDK and the Extension functionality?