Yes, he does research them. He just took his final in quantum mechanics yesterday if that says anything about the amount of mathmatics he is capable of. I could have just thrown something together at my shop but I trusted Derrick to do it for me. He takes the time to work out all the details and get it right the first time. He is not just "a friend with a welder"
His knuckles have been on Aaron Loseys ls1 240sx for years now and they work great.
Look up Losey vs Wang nopi vid for fun..
And your right, on paper it would make the car harder to turn and twitchier at speed..
But, in real life.. it doesnt.. it does exactly what I stated it does.. Our power steering can easily take the extra pressure without adding any extra driver input. If you had a manual rack it would probably effect it more. But, I have driven with and without them. I took my car up to 130 ish the other day with the knuckles and it felt planted the whole time. Not twitchy at all.
Also, just to put it out there.. I have driven scca solo, formula 2000, and a few other classes.. With some outlaw promod stuff thrown in as well.. I drift now because you get alot more seat time for alot less money.. Its also alot more fun.. I work at a chassis fab shop in Fort Worth where we build everything from bandy and legends cars to formula and gt cars.. I am not a novice who found something that made my car feel better and now I think its the wonder drug. I know this improves the s197 chassis from driving with and without it
If anyone would like to try these out that is in the Dallas/ftw area.. We have events every month.. Just check fabricatedmotorsports .com for the event schedule. If you come out I will let you ride along and feel it for yourself.