These are amazing assets! As a disabled digital artist, it means the world to me that people distribute free-to-use assets like this, since I can't easily produce any myself, anymore.
I did notice that most of your assets are under CC-BY-ND (No Derivatives), but these hoverbikes don't specify a license. I like to take voxel assets and run them through a Blender Remesh filter to create a really unique look, but I believe that technically counts as a derivative—am I allowed to do that with these hoverbike assets?