I just ordered the Supersliders from Rocky Road Outfitters. The pricing on the website is wrong, it is $100 less than the list price (for Regular cabs.) They are honoring the lower price.
Things I spoke with them about:
-The slider is "bolt on," which means no welding. Some holes will need to be drilled in both the frame and pinch weld.
-They choose to mount to the pinch weld so that the sliders are as close to the truck as possible as well as adding additional strength/support. They are not concerned with body flex and frame flex. This is because this section of frame flexes very little.
-They have had only a few problems with UPS shipping and the powder coat.
When I called them they were able to answer all of my questions and they understood all of my concerns. They seem to get a lot of calls about their mounting system . I also spoke with them via "Live Chat," that person was also helpful and quick to respond. My Supersliders should be shipped in about two weeks. So far these seem perfect for me.
***I haven't found any posts using Search, in regards to these guys or their products, even though they ship and stock a lot of 4x4 related equipment. I told them I would give them a review.