I'm pretty new at tying, and my smaller dry flies are coming out a little bulkier than they should be. I was wondering, when you're tying flies around size 18 or 20 (I've been tying Adams and ants), is it okay to just skip dubbing altogether and just use your thread, if it's the appropriate color? How would that affect the fly's floating abilities? Maybe should I just use a finer, higher quality dubbing? (I'm using rabbit dubbing that came in a case of 12 different colors; I forget what I paid, but it was probably pretty cheap and maybe intended for nymphs.) Any advice would be appreciated.

Best,

Dave