Hello all. What is the quality if the Maxi ball joints and Transit link arms being sold by Rally design?

I find Rally Design very good but there maxi joints and other similar items are very poor, the maxi joints rubber rotted out and perished after being stored in the supplied cardboard box for a year. Every joint that was supplied did the same.

After some searching I eventually found sound some NOS that has been perfect, failing that I would stick to quality items like Quinton Hazell for instance

Cheers
David