RMS adjustable struts - noise, harshness?

Early A, correct? 4 questions for you on the LCA struts:

1) are the correct OEM bushings the 1 piece per side, push in and squeeze type? or the later A, two piece hockey puck looking bushings?
2) if you were to go with the later A bushings, wouldn't that tighten things up considerably?
3) What is the length difference in the LCA strut, early A, to later A (OEM)

4) Ultimately, is the adj. stuts worth it? much improved handling?

thanks...
Mike

Mike here are my experiences with the poly bushings and the adj. strut rods. I ran into a big a problem when using the poly strut bushings. They are so much thicker and don't squeeze down hardly at all that I had to carefully trim approx. 1/8" off the back side bushing so it didn't force the LCA back putting it into a bind and also causing undesirable negative caster. IMO the adj. rods are worth every penny. They free up a normally fairly stiff suspension so you may notice more of a diff. when using them in a drag car but as Fourspeed said they add stability when braking because they don't give any. Before my car had them it had the poly bushings and it took a lot of effort to raise and lower the LCA even when the spindle was not bolted to it. Now with the adj. rods you can raise and lower it with one finger. That is an advantage to drag racers. Since I don't race my car around the autocross I can't say how much diff. there is there other than the added stability when braking.