"We have also had them run models to ensure the components designed are strong enough for the intended application - for example our K-Member design was evaluated for impact and tearout loads for the lower control arms - and we will beat the crap out of it at the track during testing as well."

Its all coming back to me, this is the welded alum K member? Do I also remember ground smooth welds? If either or both conditions are true, unless excessively over designed, which was not apparent by posted pictures, the one unknown being material thickness, and it members were in the .375"+ thickness range, and all welds were full penetration, the K member would have a very limited fatigue life. I don't see how an aftermarket niche supplier could afford fatigue testing, and the only option with the top two conditions of welded alum/ground welds, would eventually lead to failure. It those decisions were made, I would question the expertise of every other design solution they offered very carefully. I have made this very point when it was being marketed. I would like to have a XV K in my hands to better understand its design, so some of the above is just conjecture. Bottom line, welded alum on a suspension is a big no no with continuously reversed loads in a non redundant critical design member.