Minimal Series Mosquito Blender Expressio with BJF Buffer (OC-M-MBEXP) Which expression pedal to use?

Hi, I purchased the Minimal Series Mosquito Blender Expressio with BJF Buffer (OC-M-MBEXP) pedal and I need clarification regarding which expression pedal to use and purchase. The first question: does the pedal need an expression pedal with certain characteristics? I have a Behringer FC-600 at home which works but seems to create a "step" when switching from dry to wet signal. Then I have a very cheap one from M-Audio that doesn't seem to work. I read in the manual for the pedal that,  in the development of the pedal, it was used the Boss EV-30 and so I imagine this works great! Now for my needs I had thought of the Electro Harmonix Dual Expression. On YouTube I also saw an Ernie Ball vp Jr 25k used successfully. Thanks in advance for your advice and help. Renato