Is it possible to retrofit a full cage to a vortx easily or is it a back to factory for bits to welded on?

Yep, I fitted a front loop and bars to the room bar on my MNR.

The roll hoop was welded in and I made the front bit bolted in. It was a front loop with two bars back the original bar with a diagonal across the top bars.

here it is...

Same as I did with my Striker then. Just looking for a suitable MNR then now.......