Please follow volzotan's (Christopher Getschmann's) original model page (linked below) for assembly instructions.
I have been able to salvage unwanted “UP-TECH Reusable Photo Camera 35mm” from Five Below for my lenses.
The author remixed this model.
I modified volzotan's (Christopher Getschmann's) original model, which was initially designed for Sony's E-mount cameras, to be compatible with Nikon's now-discontinued 1 NIKKOR cameras.