I bought a Seek Outside Unaweep Divide 4500 backpack, and (not surprisingly) the shoulder harness was FAR too wide and long for my female 5’5″ short-torso’ed frame. [This was also the case for a Six Moon Designs Fusion I purchased, and I adapted a women’s Osprey to fit the Fusion.]
I decided to post the tutorial in case anyone with narrow shoulders was considering a Unaweep (but decided against it because of the wide harness). With a similar adapter, you can use any harness you like…
The Divide retro-fit was going to be tricky because the attachment system for the shoulder harness necessitated a certain width of the harness. I decided to use a Deuter Slim Line (SL) harness, because I know that they fit me perfectly.
Since the width of the Deuter harness was a few inches narrower than the Divide’s attachment profile, I decided that the best approach would be to create and “adapter panel”, which would attach to the Divide exactly as the original harness had done, but would also allow me to attach my SL harness to the back of the pack.
Materials: Nylon (mid-weight) fabric, triglides and 1″ webbing (supplied by pack manufacturer), .20 sheet styrene, 1/2″ wide plastic stiffener, grosgrain ribbon, and thin foam (for padding).
Cut cut 2 identical adapter panels, wide enough to carry the triglides that attach to the Divide. Below is the basic adapter panel, with the triglides and webbing already sewn on.

On the second adapter panel, sew the webbing to which the Deuter harness attaches onto the right side of fabric; then sew a “channel” out of grosgrain (I used pink for visibility) into which your stiffener will slide. 

Attach a styrene sheet (or plastic sheet — any type of stiffener you have on hand) to the wrong side of one of your panels. Slide the 1/2″ wide plastic stiffener into the channel, and tuck the excess grosgrain back into the channel. Attach thin foam to the wrong side of the other panel.
Sandwich the two panels together, and sew the grosgrain (neatly pressed in half) along the edges of the panels, sealing them together. Attach the adapter to the Divide, using the same method as the original harness, then attach the Deuter harness to the adapter. Voila.


