I bought the Six Moon Designs Fusion 65 because I was interested in the hip belt, the suspension and the pack weight. When I received it, the harness (what they call the "yoke") did NOT fit at all — it was clearly made for the male anatomy.
I didn't even want to try putting weight in the pack with a harness that fit me that badly, so I developed a MYOG hack that replaces the SMD harness with that of a women's pack.
This way, you can purchase any "replaceable" harness from any brand of pack — so you KNOW it will fit you properly!
I bought a Women's "small" Osprey harness (for the Ariel) on eBay for +/- $15. I then modified that Osprey harness to fit onto the Fusion body. It's a beginner/intermediate sewing project — mostly it just requires the patience to neatly rip all those stitches!
Here's the how-to for anyone out there who wants to do this:
Cut around the sides of the velcro on the new harness, and carefully remove all the stitching with a seam ripper, until you completely detach the velcro.

Using the SMD "yoke" as your guide, line up the straps, and trace around the SMD yoke. Cut the new yoke slightly smaller.



If using the Osprey, you'll need to cut out and sew a piece of nylon fabric where the velcro used to be. Then attach a trimmed-down piece of the velcro that you removed earlier.



Next, I sewed grosgrain ribbon around the edges of the new yoke.

Finally, because the Osprey harness uses 1" webbing for the load lifters, while SMD uses 3/4" webbing, I replaced part of the webbing on the Osprey with 3/4", securing it with 3 rows of bar tacks. (I tried to "hide" the transition under one of the Osprey's existing straps.)


The end result:

Edited to add: I sold the MYOG harness at cost to a member whose wife liked the pack, but had the same issues as I did with the stock "yoke", so at least it will get some use! :^)

