Hi chinertowners...
I would like to build a hardtail MTB with suspension and drop bars...

Idea is also to have dropper post.
I would like to use RX levers in combination with GRT derailleur.
The left RX lever would be used as a dropper post actuator (with some modifications to the mechanism)

Does anybody know if the derailleur pull ratio of the GRT and RX levers is the same?

And another question, what would happen if I would use MTB style (2 or 4 piston) brakes in combination with any of those levers?
Since all the mounting points for the brakes will be post mount, I would prefer to use MTB specific brakes, to avoid unnecessary flat mount to post mount adapters.

So ideal combination would be RX levers, GRT derailleur, ZRACE x2 or x4 calipers.

What do you think, is there any chance this would fit together?