So today I went under to install the Sumosprings, the left side seemed OK. The gap between the frame and the bracket was about 3.75in. Which did not require me to use any spacers. But the right side distance was at 3.25 from the spring to the frame and the leaf spring strap was no longer on 3 leafs, only two. It appears much flatter that the left. This surprised me because the slide out is on the left and I thought the weight of it would have flattened it out more.
The strap looks in place but it is not. I can easily slide it to the left. It is barely touching the 3rd strap.
BTW it is out of warranty and I feel better getting higher quality parts myself as opposed to dealing with the manufacturer.
Here are some pics I captured.