HAHA! this one gave me a sleepless night ^^
($Leaves[$i])($new) 
BUT!
the only thing is now - the procedure starts with the 2nd item - constrainig them all is fine! but after duplicating the last Leave this one doesn´t get constrained and maya says:
// Error: line 15: No object matches name: //
guess I have it soon 
everything starts and ends in the right place at the right time.