When you were talking about the all moving wing for the aircraft at around the 3:00 mark there is a part in the joint tab that you can put a wing on and assign a control to the joint to move the whole wing assembly (I don’t remember the part name but it looks like a white cone and once you put the wing on it you can change its size and move the wing with the translate tool to hide the seem between the wing and the body)
If you lower the pressure ratio of your engines around 4, increase the bypass at 2 (low bypass mode) and increase the tip mach to mach1.5, you have a working ramjet that can go around mach 4.5 or maybe over mach 5, however you need to fly at very hight altitudes to prevent theses from sucking up all the fuel in seconds
