Used a rickety old box to get a long exposure, fortunatly it stopped swaying by the time the timer opened the shutter.
35mm cropped to fit 8x10 graduation burn of 1/12 stop from right to left, 1/12 stop burn of chain shadow.
This seems stronger as a thumbnail. My guess is that printing or cropping borderless and framing with black or grey paper underneath (the way I temporarily frame large prints at home) or with pure black mat board (without white bevel cuts) would accomplish the same strength.