35mm Film on 120 Spool Adapter Free 3D print model

UPDATES ***
7/6/14 - I've added a PDF Read Me guide (v.2) to using the adapter.
6/16/14 - updated files to improve fit and reduce friction. May be loose on some commercial canisters but will now fit CineStill film and possibly Kalt. Print using 40% or 50% infill.
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Tested and working. This adapts 35mm film for use in 120 medium format cameras. By using this, you get full exposure of the film strip, sprocket holes and all. This is designed to be a perfect copy of a 120 spool when the top and bottom parts are inserted onto a 35mm film canister. Use an empty 120 spool for the takeup - it's easy to modify it by taping it to accept the 35mm film tail in the right place and make the slot thinner to grip the tail.
The bottom part is printed as is. The top part must first be rotated 180 about X or Y to sit flat on the bed for printing. Recommend 40% infill (even 50% is ok) due to the small cross-section of the splines.
Do not force adapters on. Make sure the splines are aligned and if tight, trim/sand or wiggle on carefully. The splines may need to be trimmed to fit Kalt bulk loading canisters and some others.
The hole for viewing the film number (usually a red window) on the camera must be taped over with black gaffer's tape or some suitable opaque tape to avoid back side exposure of the film. You will need to wind blindly about 1-1/2 turns at the beginning and taper down to 1 turn at the end. Most medium format cameras have no rewind, so you will need to unload the film in a darkroom or changing bag and manually rewind the 35mm film back into its canister. When processing, specify "process only" and "do not cut" and cut the film yourself.
These were designed for the Flyer 6x6 camera developed as a result of the Pinhole Printed Kickstarter project (http://pinholeprinted.com) but can be used in any 120 medium format camera. If you do not have a 3D printer or have it tied up with other things, you can order them from pinholeprinted.com and support the artist in future creations.
This is CC by SA 3.0 - this means anyone can freely print or even sell the adapters - but you must provide attribution if you do so. You can print a Thing Tag right off this page and display it if demonstrating your printer capabilities or distribute it with any copies you sell.