Timeline and Milestones

When the girls, Dr. Morris, and Sinhah went to the observatory, I stayed in my room reviewing all the lectures of the electronics section along with working on the Pre PDR. The timeline and milestones part of the Pre PDR is so confusing, I made a gant chart but im not sure if its correct. Im being told that I dont include the milestones into the chart but I believe that I do. What should I do? As the group decided that we should just do it to the best of what we understand and just figure it out. No matter what Greg along with the other stuff are going to have feedback regardless so I will just be prepared. Hopefully, where ready to move onto the next MILESTONE....