Thank you both so much for the advice. So I chose the Erbe-Verb because I thought it would be fun to be able to animate almost every aspect of it with CV, which doesn't make much sense, when I don't have enough space for modulation. So I revised the rack and got rid of the Erbe-Verb like you two suggested, and fittet more utilities.

If needed, I could free additional 6 HP by swapping the Tallin for the 1U VCA.

ModularGrid Rack