Unofficial Contest: Pushing [Lag free] (Longer rocket Pushing)

Credits to NanoDude
But this contest is similar to hardcore. But little more hard, the difference is that the rules will be different.

There is only 3 Rules because it limits Creativity:
1. No modification to sled and outside of building area
2. Do not change building area size but you can change only left border size
3. Adding rail to rail in different layer is allowed, even outside of building area.

There no deadline for this contest

Have fun!!