Sure, there they are.maya_export.zip (1.9 MB)
I did not try another gltf viewer. I should give that a try, thanks.
Edit: It seems like the Scale factor in the exporter does not work as expected with gltf. With .babylon the joints are scaled as expected. In this Maya file I grouped the joints and scaled the group 100x instead of using Scale factor: 100. arvid_rigging_merged_test.mb.zip (1.1 MB)
That does not explain the mesh issue with .babylon though, but perhaps .gltf will work just as well for me.