Legend vs RTI
 

Anyone know of a way to link the Legend output to the RTI screen without forking out hundreds for an interface?

Speak to the supplier of the Legend. He has done it many times very successfully.

I did and he said you'd need to buy an interface or the Taiwan version of the RTI screen.

That's your answer then

Anything else is very DIY: you need to get RGB signals and build a serial data controller to control the screen and switch it to the right input.

As I gathered. Was wondering if anyone else had managed it another way.

None that I know of but there may be examples on something like swedespeed.