I've used the indexer as a hold down on a bunch of other projects. Mostly, for "drilling" a hole down the center of a piece.
I do this by making two pieces of material precisely the same size, temporarily attaching them to each other, then mounting them in the indexer.
I carve a channel (round/square/?) down the center on two opposite sides, then take them apart, switch them around so the "hole" is now complete, glue it up and presto. I have a piece with an exactly sized and placed hole drilled all the way through it. Very scalable.
I'm sure there are better ways of doing this with a lathe or some other tool.
ShopBot Details:
2013 PRS 96x60x12 (Centroid upgrade)
4hp Spindle
12" indexer
Aspire
Rhino
Fusion 360
Ferrari 360
Prusa MK3S+
Prusa XL multi-tool