welp..to answer the question lady violet asked.. i started with commerical combed top.. i've since then spun from locks, batts, fluffs but haven't yet used a true roving.. i suppose batts pulled into roving would be close enough but nothing prepaired as roving
i like it all!
and to fibrenut top is basically a totally combed prep..
this thread could be helpful.. there are pictures!
and also there is an offsite link i posted there for a spin off article that i think explains very well different sorts of fiber prep