1300371/3dprinter-longer-lk4 ? reverse-engineered prompt

Build me a simple, clean page for the Longer 3D LK4 Pro that collects the printer setup in one place.

I want it to show the Cura printer settings for a custom printer, including the build volume, heated bed, nozzle size, filament size, and the start G code with G90 at the beginning. It should also have a clear section for OctoPrint connection setup, plus a firmware downloads area with the available hex files and a short note about what each one is for.

Please make it easy to read on desktop and mobile, and keep the layout simple like a support page or hobby project page. If anything in the setup needs current guidance, look up the latest Cura or firmware docs online and use that to make the instructions more accurate.

Also include a small issues or notes section for things like the abnormal temperature fix and the noisy fans, and a resources section with the original Longer folder link.