Buffering into existing FC (like in Editor menu) in Arcmap 10.3 Model Builder

I would like to buffer features into an existing FC within a GDB, similar to when buffering during an edit session by using the Buffer command in the Editor menu, not the Buffer geoprocess which creates a new FC.

Is there a way to do this in model builder? I can only find the buffering geoprocess tool that makes a new FC. I did consider using this, then selecting the features in the new FC and appending them into the existing FC but that adds a bunch of steps, however so far that seems like the way to get it done.

Ideally I would have a model where:

1. the user points to a FC to buffer
2. chooses the type of record in the FC to buffer
3. chooses which FC to buffer the features into
4. the model selects by attribute to focus on those records
5. creates buffers for the records in the existing FC
6. updates field values in the existing buffer FC for the new records to record what type of record they are from step 2

Any advice on that?