NAS firmware upgrade breaks mono (wrong mono version)

I assume you have seen this?

If so, please feel welcome to reply to that how-to topic, explaining why you would not recommend installing duplicati on a ReadyNAS. That could save others from those headaches.

Personally, I am considering upgrading my ReadyNAS Ultra to OS6 (because mono doesn’t run on the old RAIDiator firmware) just ti be able to run duplicati. But it looks like it’s not worth the trouble?