Gradius III cube rush alternative solution

Solution for the cube rush which not many seem to be aware of. Cubes flying in at their highest possible entry point are still too low to harm your ship when at the top of the screen. This can be used to build an easy protective barrier at the top when you get patterns with several cubes spawning at the highest point early on, which happens surprisingly often. This clip is itself from a one-life clear of the game.