Please excuse my crude drawing! I loved this track but had trouble with the jumps in front of the rostrum too. I found It hard to hit ramp 1 with the correct speed, too fast mostly!!
Too much speed meant overshooting ramp 2 and landing on the up part of ramp 3 killing all my speed causing me to nose dive into the up part of ramp 4.
Do you think moving ramp 2 and 3 further apart from each outer would help? Maybe give you more chance to correct your speed?