ended up getting combo working by populating a dataview with the BAQ - I passed BAQ params in event that populates the dataview. Then, combo simply works off the dataview. A little run-around and I would still like to figure out these filters for using a BAQ directly however this works.
Is there any way you can share the Combo Box setup?
In my case when the Part Entry layer loads, the BAQ Dataview populates with data, but the Combo Box shows the EpiBinding value instead of the TextField. It populates with the correct description only after I click on the Combo Box dropdown arrow.