Is there a way to take selected table rows and pass them to a new model and then join the passed rec

In that case, one other possibility to consider is setting up an Apex action, Flow, or something similar on the Salesforce side and executing it via Skuid’s action framework. Here are the options that are available for the Salesforce data source:

And here is the relevant documentation for this: https://docs.skuid.com/latest/en/skuid/action-framework/action-framework.html?highlight=invokable#sa…

I think it would be possible to accomplish this just with Skuid actions; adopting rows and updating fields, etc., but you might find Salesforce’s built-in tools more handy for something like this. And then, you would have access to the process even outside of Skuid, should that ever be necessary.