lotsa spindle questions?

[jberry16]

After reading things online it seems that the spindle I have is (2.2oz) good for spinning worsted-bulky yarn, right? If I want to spin fingering-dk I need a spindle that weighs less, like 1.3oz or something right? Is the entire spindle weighed or just the whorl? Then my other question is can I spin any wool fiber on either spindle? or are there specific fibers that work better on each? And final question, should I seperate my roving or just use it as is for both spindles?