Adjustable Strut Rods

Thank you for all your replies, though I do not understand everything stated so please bear with my questions. First, when replacing the bushings, it seems better to replace them with the hard rubber bushings rather than the poly ones due to the allowance of movement in multiple planes as opposed to the poly bushings. Polys may last longer but the original rubber most likely will perform better.....
Second, the adjustable strut rods are more to prevent binding on the lower control arms throughout its motion during use. How does one even know whether the suspension is binding or not? What does that mean to cycle the suspension through its complete range of travel and adjust so that there's no binding? Where is the binding checked at? Third, to be sure I'm understanding right, this strut rod adjustment is not used at all for Caster specification adjustments? Only for assurance of release/dissipation of binding? Would a front end alignment tech know what to look for in regards to set it so there's no binding??