Continous Particle Bind - Max Binds

[usc001]

Hello, 
in particle Bind operator we can set Max Binds per particle. 

When timing is set to Continous the number of Max Binds is per Substep? or per frame? 




Now when im set to continous and have Max Binds of 2, tyflow will create 2 new binds each timestep. 
How can i achieve a continous binding (each substep/frame its checking for closest particles) but also keep the Maximum amount of Binds constant? 

So i would like to have exactly 2 binds per particle but every timestep i want the bind to update to the 2 closest neighbours. 

Thanks in advance 
Moritz