ZF S5 17 Synchro Ring Question

I’m going through this transmission and it appears that it’s common to replace the synchro rings. Do the teeth of these typically wear or is it some other clearance? The teeth of the synchro rings I removed look very good, is there something else I should measure for wear.

BTW, I needed a die grinder to remove the large bearings from either end of the primary case; not much fun!
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