Hi,
This felt like cheating to me initially, but as interceptors are amongst the admissible parts, a few ramps can be removed by adding a second interceptor at the top for the red ball.
https://lodev.org/jstumble/?board=rie1flrf0e0eellller0r0eellller0r0eelrlrerexerei_16_1
There may be other puzzle solutions for which you can reduce the number of parts with a second interceptor.