Can’t answer that one. When I ordered mine I saw several reviews of the R&R on bass fishing forums and knew that Skeeter was installing them as a factory option on their MX and WX lines. R&R allows for about 7” of rearward slide and is heavy duty. Shuttleslide didn’t even hit my radar last year so they must be a brand new company or product. Lift Master and Sidemaxx were the other two mounts that I considered. Still would have went with the old MK mount if they hadn’t discontinued it.