So I was thinking about the mixing and matching of the duro joints with JJs and thought about the residual stress that could be built up in a Duro joint because of the resistance in the JJ. Couldn't the same thing happen if you don't pay absolute attention when setting the length on an adjustable MC arm. I know I've installed control arms where the bushings on the same arm were not exactly parallel to each other, but the spherical end compensated and adjusted to fit. Is it super critical that an arm with Duroflex bushing be adjusted to length and them tightened down so the bushings fit both ends completely parallel to the mounts? Just not picking a little, I know that, but sounds like if it matters enough to not work mixed with a JJ, care might want to be taken to make sure both ends of the arm exactly fit into the mounts, so that at static ride height there is no stress in the bushings.
I've set my arm length with one end connected under the vehicle, when I tightened down the jam nut I always ended up with a bit of a twist in the arm. Usually I do a much better job keeping the ends parallel when out and clamped in a vice. Sorry imped, I know this is your review thread, but being that it is already 7 pages long I figured this might be something to bring up.