Wanhao Duplicator 7 Handle.
Just like Formlabs machine, this handy handle will help you get a good grip on the build plate while you work on it.
The handle is hollowed to add counterweight in. Without it, the handle is not heavy enough to stay in place when the plate is 90° from the ground. Put screws, bits or scrap metal then glue the cover on. If you want to lock the rotation of the build plate in the handle, printer the Alignment part and glue it in.
Required build volume is 180x80x130. Print at 0.2mm and 15% infill. Might need a few support.