Looking at the TM_MADs it looks like the same use case as How to use a second datastore but for fs_lvm driver - the images are transferred to the SYSTEM datastore but you need to have symlinks to their datastores instead… (note that you haven’t the luck to use “persistent” images as workaround, though.)
Lets hope it will be rainy outside so will have some more spare time…
Best Regards,
Anton Todorov