Lomograflok Adapter for 3x4 Graflex SLR

This only exists because I bought a Graflex SLR sight unseen and I needed to test whether it works properly after servicing it without having to go through a roll of film. It's a bodge, and I'll probably spend some time coming up with a better solution soon. 

I've included the STEP files here, so go mad and improve this to your heart's content.

This mod comes with many caveats:

• The film plane is moved back 30mm, which means you lose the ability to focus to infinity, in fact you can pretty much just do head and shoulder portraits (and closer)
• You need to remove both the original viewing hood, and the clips that hold the ground glass in place
• When the riser is in place, you won't be able to close the top lid

Ok, with that out of the way:

1. Slot the Lomograflok into the adapter and secure in place with a tripod screw
2. Place the adapter into the original film back holder and slide the clasp into place to hold it there
3. Unclip the viewing hood, and unscrew one of the retaining clips in the top lid to totally remove it
4. Unscrew the clips that hold the ground glass and store them somewhere safe
5. Place the ground glass into the recess in the bottom part of the riser, and then press-fit the top part - this securely and safely holds the ground glass in place
6. When you're ready to shoot, simply place the riser into the camera - it sits loosely at the moment, and that's on purpose, as my idea was to simply remove it once I'm done shooting so that the top lid can close, and I can store the riser in my bag as the ground glass is protected