Network Ownership Problem

Hello, I want to make jumping system similar to Ride a Cart Simulator / Yeet A Friend.
When you touch start part it spawns a cart model and after some time it “animates” cart driving down a ramp. When it reaches end cart starts to fly. Player can rotate cart when its flying.

The problem is I don’t know how to script it to make it smooth and exploiter-proof, so they dont eject cart so far that they get infinite coins.

I tried a lot of things like making two parts: one with network ownership set to player and next’s part network ownership to server. Then it would animate and calculate physics on server and player could also move it midflight. The problem is it didn’t work, and it was laggy because lerp animation was on server.

I don’t want you to make entire script, just idea how to make it. Thanks!