I put together a 100% krpano 3D product viewer (inspired by sketchfab examples)
First example: 3D Product viewer + sync the supporting html
https://krpano.kri-soft.be/3Dphone/
Second example: popup 3D Product viewer
https://krpano.kri-soft.be/3Dphone/pano.html
Awaiting your comments, suggestions, ideas, thoughts, ...
KME