Possible to have attributes that are not stock-controlled?

Hi there. We're on 1.39d currently (will be upgrading to latest soon) and are using the Products by Attributes Stock add-on by dafonz. This has allowed us to set up a set of attributes for concert ticket type -- such as section A, section B, section C, etc. -- and set up stock levels for each. This has worked well for us for a while.

However, this year we've introduced a few options into the mix that require us to set up an additional set of attributes for a couple of "season pass" products. There are four "concerts" this year, but one of them has two performances, so for a season pass, we need to ask the customer to choose one of them. Also, there's a "3-concert season pass" product, so we need to provide them a list of performances to choose from, in addition to the ticket level.

I can set up the attributes fine -- one option name for ticket type, another option name for "choose concert(s)" -- but when I go to update products by attributes stock, it requires that each variant include both options.

We basically need to set a stock level for just one of the attributes, and have the other attribute purely there for information (not tied to a stock level). Is this possible with Products by Attributes Stock, or any other base feature or add-on?

Erik