Yes to shorter chainring bolts and also to a chainring without the various ramps that help with shifting
The inner chainring doesn't have those weird ramps I think. I've been running a 5800 inner chainring for single speed and it works fine. It's not used for cross though so YMMV
@Big_Ted started
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Yes to shorter chainring bolts and also to a chainring without the various ramps that help with shifting