Today I collected a 90 Degree swivel for my second stage and a second HP 100 tank. These were the last pieces to the puzzle so all is good - I will jump in the pool tomorrow to validate everything...
I have also attached detailed pictures of the SMS100 harness. Rob posted a good comparison between the Nomad and the SMS100. I wanted to take the time to explain the design of the SMS100 which the attached pictures show in detail.
The SMS100 has more in common with the Z system and the Razor than the Nomad/Transpac...
The SMS100 is made up of two components - the wing and the harness. The harness incorporates the flexible backplate and webbing as one integrated component...
Harness
The shoulder padding is the flexible backplate and extends from the back over the shoulders down to the harness break points.
The shoulder webbing (one for each shoulder) starts on the flexible back plate and extends over the shoulder and down to the D ring/breakpoint then doubles back up the shoulder. The first layer is stitched to the harness padding.
The waistband and lower webbing for shoulder straps both attach to the back of the flexible back plate. Routing is very similar to Z/Razor where the end of the shoulder strap and waist band come together at the same spot in the small of your back and is secured to the back of the flexible backplate via heavy stitching.
Wing
The wing attaches to the harness via two bolts in the middle of your back. Certainly the wing can be removed from the harness and bolted to a standard BP.
For the SMS100 harness, there is a velcro back pad which attaches to the wing and covers up the bolt attachments. Two small tabs on each side of the lower wing thread to the waist belt to stop the wing from taco'ing.
Modifications
Anyone with an industrial sewing machine can do anything with the SMS100 harness. Likewise, the wing can be installed on other harnesses or BP's. My dad's business was car/truck/boat interiors and he has all the tools for me to produce a flexible backplate. Once I am comfortable with the SMS100, I will likely make my own flexible BP for the SMS100 Wing to fit a Steel/Al BP fitted with a continuous webbing harness... because I can.
Overall, the build of the Hollis SMS100 is good.