I've created a working fast fix for the shoes that will allow you to parent and pose the shoes without further issue. It involves surrogate parent smart props... I'll upload the files to my Google drive and instructions here when I get a chance.

You won't be able to bend the toes or the feet as they will be locked so there will be that limitation but the fix will work in all instances besides... Should be ok for most poses.

I'll follow through with the link and instructions after I've had some dinner...

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W10 Pro, HP Envy X360 Laptop, Intel Core i7-10510U, NVIDIA GeForce MX250, Intel UHD, 16 GB DDR4-2400 SDRAM, 1 TB PCIe NVMe M.2 SSD

Mudbox 2022, Adobe PS CC, Poser Pro 11.3, Blender 2.9, Wings3D 2.2.5

My Freestuff and Gallery at ShareCG