Windows 10, Bootcamp, Logical Fusion Drives

Hi all,

I have a iMac 2017 4k with a 1tb fusion drive. As far as I know W10 is supposed to be possible to install via bootcamp on Mojave (it is not in the unsupported list like previous models). Currently the HD is setup as a fusion APFS volume, my problem is that I do not want to separate the SDD and HDD, as that will obviously slow everything down and the 28gb SSD is too small for any capable OS install/usage.

When I try to use BCA to partition it will get just over half way and the progress bar stops even though it created the two partitions needed to install W10 (although blank), forcing me to quit the app. BCA will not restore the partitions back to the Mac side (to its former full size) and throws an error. This forces each failed attempt at installing/partitioning via BCA to be followed with me booting via external Mojave installer drive, then separating the fusion drive and formatting the SSD and HDD Volumes as HFS+ and recreating the fusion drive via Terminal, then using first aid to fix/auto create the first partition.

If I use an external W10 installer and try to format the Bootcamp partition, the windows installer throws an error stating it is unable to format the drive and cannot be used for installation, see the log, bla bla bla.

So I am unable to use boot camp assistant, and I am unable to manually format the drive while it is in the logical volume group/fusion drive state. I have not found anything like this on other posts, similar and already addressed by apple but I believe my situation is not even in the same category. Has anyone had luck getting windows 10 on a fusion drive at all with Mojave? I am just curious because I see nothing saying it won't work on a 2017 retina 4k iMac.