Hello Ori
In my situation i’m having bouncing object and every time i’m running the simulation, i’m getting difference results. Do you think in 4.5 there will be improvements in such cases as ours.
I’m primary using blueprints but sometimes 1-2 rows of code 
(very basic)
Can you explain further how to set exactly the sub-stepping to get the best possible results when simulating physics.
I didn’t get what you said about AddForce and that is actually is independent.
When you apply a force of 10 on an object with mass 1, the object will experience an acceleration of 10 cm/s^2 for the duration of the frame.
1.How to apply force of 10
2.How to set the duration of the frame-rate.
if you can answer all that it will be great, my goal is to have same angle, speed of the bounce object every time i run the simulation.
Any Help is greatly appreciated !!!
Regards