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