QNAP TL-R400S compatibility

[MBonnerup]

Currently running an application server with an old Synology for storage in a wallmounted network rack.

Considering converting the application server to a full HexOS based NAS, but storage capacity in the current chassis is limited, so looking into external storage enclosures.
Best option I can find, that fits in my shallow depth rack, is a QNAP TL-R400S.
Any reason why this wouldn't work? Specifically concerned about compatibility with the QXP card and disk modes.

TL-R400S | High-performance short-depth rackmount SATA 6GB/s JBOD storage enclosure | QNAP (US)

[SpasticPalate]

I'm eyeballing this enclosure as well and would love to know if anyone else has had success with it