Custom Properties - set and get values

[Ben Schmücking]

           
   
I am still struggling with custom properties and hope, that someone can help me understand...

What I try to achieve:
Particle A ("source") is modified by several operators. Its z-position shall be transferred to particle B ("result") of a different birth-event.
Since A is part of a cloth bind, I use a particle C as messenger, which is linked to particle A as target.
 
But whatever chanel, value, modus (Cust.Vector or Cust.TM), evaluation priority I try, it does not affect the particle the desired way. It always moves from position-object to position-birth 0,0,0.

When I keep it in the same birth-event, everything works fine. This is the precedure of Simone Natastis great tutorial or Bobans tip about Custom Properties. E.g. I can put the box back the initial state (Set>value/chanelelf >> Get>value/chanelelf with correct evaluation priority)

Thus I guess, I did something wrong with chanels/values.

I understood the concept like in the sketch (neglecting the timing options):

Particle A
Frame 1: Set "value: Self" -> write property of A at frame 1
Frame 3: Get "value: self" -> put back property of A at frame 1

Particle B
Frame 1: set "value: self"
Frame 3: get "value: target" -> reads property of B at frame 1

With different value-settings (self/target) I can control, how particles communicate with eachother.
With different chanel-settings (self/target) I suppose I can keep the communication even when the particle die at different frames.


But maybe I am mistaken?
Can someone help me out with this?

Thanks in advance!