suspension interchangeability.....

i hope someone could answer this question for me,

i've heard that suspension parts can be used from the UCF20/21 series to update your suspension setup on a UCF10/11, eg: drop spindles, control arms etc.... also are the air struts physically shorter?

could someone elaborate on this? 

ive put money aside for 4 new air struts from arnotts industries, and have some cash left over to do a few other things, so i'd greatly appreciate some input on this ;)

regards, con.

I wouldn't go spending money on the information I'm about to tell you, but from everything I've heard, the struts on UCF1x are interchangeable with UCF2x... I think :-\