SpaceX Falcon 9 Block 4

Thanks to @ForestKatsch for the original model! Here's the link: https://sketchfab.com/3d-models/spacex-falcon-9-block-45-12285ccc02de4d5c91b00632f0722c92 The SpaceX Falcon 9 Block 4 is a "Full Thrust Variant" that was upgraded in 2017. This version of the Falcon 9 was the testing phase of the SpaceX Falcon 9 Block 5, which already appeared in May of 2018. Right now, all current Falcon 9 rockets are the Block 5 variants, while the pre-block variants are now retired. The rocket is not used to refly more than twice.