@sheila5 I had similar difficulty with mirror modifiers in my cart. I ended up having to apply mirror to the low poly parts required, then duplicating and applying Hi-Res to the Hi Poly parts so I could mirror the Hi-Res mesh so I could bake the normals and other maps to the Low Poly.
I think a lot of us are going to come out of this Collab with a few hard learned lessons, especially about Sculpting with modifier.
I hope you cart turn out well this week, I’m looking forward to seeing it.