If someone is going through the R&D to make aftermarket control arms for a niche chassis, make them functional and reach more buyers.
From Mike Kojima's Making it Stick series in SCC.
Suspension Tech - Sport Compact Car Magazine
On the SE-R, the lower control arms are positioned so they begin to point upward as the car is lowered. Now when the car rolls in a corner, the outside tire goes into positive camber. And, if you've been reading this series, you know that is just about the least effective way to corner.
Believe it or not, it gets worse. With the lower control arms pointing upward, the instant center starts to drop rapidly and the roll couple greatly increases. The bigger roll couple causes more weight to transfer to the outside wheels and more body roll.
In other words, our cars benefit from the ball-joint being relocated to a place on the control arm that will correct this shortcoming of a lowered McStrut car. An example:
Suspension Modified Photo
A threaded heim joint ball-joint would be okay, but it would have initial setup and all-weather durability drawbacks for most people. It might be best to make front LCAs with a relocated ball-joint hole that accepts a standard rubber-booted Sentra ball-joint. Press in new bushings and Moogs, and go.
I don't have an open mind to aftermarket LCAs that are only pretty. Don't waste the time. Have them sell ones that work, too.