The “Part Category Main” and “Part Category Sub” of the program in Part 1 determines the Main and Sub Category setting for the entire Performance. The reason it reads “Drum/Perc” is because you started building your Performance with a Drum Kit.
Change the Main and Sub Category of Part 1, and you change the Main and Sub Category of the entire Performance.

From the HOME screen touch Part 1 to *select* it
Press [EDIT] to view Part1 - Edit parameters
Touch “Part Settings” > “General” > change the “Part Category Main” and “Part Category Sub” to reflect the Performance you created.
Press [STORE]

Thanks, it worked. It's good to know that the first part specifies the categories of the whole performance.

I had seen this option before, but was afraid that it would also change the categorization of the original drum kit.

Thanks, it worked. It's good to know that the first part specifies the categories of the whole performance.

I had seen this option before, but was afraid that it would also change the categorization of the original drum kit.

The original “Drum Kit” remains exactly where it was and it remains exactly how it was originally programmed. Your new Performance contains a completely new Drum Kit based on that Kit’s programming.

When you build your own Performance and Part 1 is a single instrument (the Main and SubCategory listings make perfect sense); but, when a Performance Part is one of an ensemble (band) or each Part is used as a building block to a mega instrument... know that Part 1 serves as the searchable entity. It ‘anchors’ the Performance.

If you are building an ensemble of instruments (band) then you are likely assembling them to perform a song via a sequence. The Name of your new Performance might likely be the name of the Song you are assembling the instruments to play.

When you understand how the search engine works, you’ll understand you can search for and find that same kit you started with and it will be exactly as it was when you started to assemble this “band”. But once you create your new Performance, if ever you want to use that exact Kit you would do a Search for the Performance by its song title name... then you can designate any instrument Part, 1-16.

In old systems, like the Motif or MO-series, you would store a Voice, and all changes to that Voice applied wherever and whenever you used that Voice... there are no Voices in the MONTAGE/MODX, each Part has a unique version of the data you store to it. In the Motif and MO-series you could make a special version of a normal Voice and store it as a “Mixing Voice” locally within the Song or Pattern you created it for... well, Parts in the new system are like “Mixing Voices”... you now have enough memory to store each normal and drum Kit Part as a “Mixing Voice” - it is available and searchable through the Performance name it was used in, and the Part number in which you placed it.

Say you have a Drum Kit, an Electric Piano, an Electric Bass, a Synth Bass, an Orchestral String sound, a synth lead, Brass horns, and percussion. Any edits you make to these Parts in your custom Performance are stored as unique entities... searchable by the Performance Name and Part number.

In a Performance where the multiple Parts are used as building blocks (such as in the multi Part acoustic piano ”CFXConcert” ), Part 1 serves as the ‘anchor’ that speaks for them as a Group.