Backwoods BMP rear bumper would be a good choice to stiffen the tunnel when using these skids. 1/4” thick and wraps around the running board bracket in that weak area. Learned that the hard way also. Had a baker skid on my M7 and it taco’d coming out of Keystone on those 3’ whoops.K mod is evolving day by day. originally the mounting locations were in specific areas, no he is giving multiple mounting locations as per what kind of end result your looking for as well and shortening the shocks and changing the location on the coupling block by 1/4 inch. The coupling block itself is also different. big changes, all with different riding characteristics. That redline skid is not only a direct knock off of kmod, but i seen one break at the welds on the rear arm. Although i do gotta say he got the rear drop bracket stiffeners on the head, we have to build custom drop brackets for our k mods to withstand the abuse that is one area k mod could use some work on. good thing my tig skills are on point lol.