Source – to be able to select group by attribute

Hi, I really like the idea of this plugin.

For the first time i am trying to group products by making them variations. But I noticed title will not be dynamic. So I would like to keep them as simple products but to link them.

I have quite a lot of products to import. And there is an attribute called ‘groupno’ in my feed. The groupno groups the products together.

on configuration I cannot seem to select anything other than ‘products’

1. Can i group them by the attribute title ‘groupno’ rather than specifying which group number will be applicable?
2. if a particular simple product (with link) is out of stock will it remove the swatch?

Kindly let me know