A cage is a always a welcome addition to a land rover, ive had the misfortune of being in a severe accident where the cage genuinely saved my life.
Not only that but its been a huge benefit for loading things on the roof!
Saftey Devices also...
100% agree + Gareth would do a full health check before hand to check all is well.
As with anything remapping can highlight any issues with the engine you currently have.