You may want to check this link- http://expressionpedals.com/list-of-expression-pedals -to see specs on a variety of pedals for keyboard/ controllers as they are not all necessarily optimal for yours. I ended up with a Boss EV-30 for my old StudioLogic Studio 900 because they recommend a 10K Pot as opposed to a Yamaha FC7 exp pedal (the most popular among the keyboard community) with a 50K pot.
Agree with all of the above.
But if you want CV + Expression the Behringer FC100 is great with hardware like your EuroRack Modulars.
And if you seek true sickness the Source Audio Reflex.
5 x MIDI CC’s simultaneously, great for drawbars of tonewheels organs like a Hammond B3, or ganged faders, etc.
Then CV for Super accurate Filter Sweeps.