Hi there, I REALLY NEED HELP

To start, 1. I have replaced the coil. 2. I have re-built the complete ball lock trough with new parts. So essentially it is all new

When I lock the balls in the lock ball trough in rediness for multi ball the balls wont kick out all the way. So heres what happens

1. Ball 1 in the trough "no lock lit" kicks out perfectly plenty of power
2. Ball locked x 1 and then hit ball in lock trough kicks out no problems, but can struggle to make it all the way out up to mini play field
3. Now I have x 2 balls locked and launch a ball into the lcok ball trough.
Now what happens is the ball kicks out past only makes it half way up the wire cage to mini playfield and drop's back down.
4. From here the next ball has dropped into position ready to be kicked out. So now 2 x balls are trying to be kicked out which does not work and the game is stuffed.

From what I can tell, is that the balls as they get kicked up push the other balls out of the way in the trough and when 2 x balls are leaning into the 1 ready to be kicked takes the necessary power away to release the ball all the way to the top mini play field.

I stuffed if I know what to do. SOS. HELP