Excellent guide!
Do you think this could apply to other Chuwi tablets? I’m thinking of doing this with my Hi8.
The guide specifically warns about touching the recovery partition but could it not be mentioned that those actually can be deleted to save an additional ~ 6GB of space but *ONLY* if you have done the steps to move the recovery data and created a bootable recovery USB.
That could be the second guide to follow after removing Android from your tablet to maximize space for Windows.