i use CB70's like Jamie said. my male is a little over four feet and my female starting to get well over 40 inches.
as for going off feed my male hasnt eaten since february 5. he's been on an on and off fast since september 28 of last year. he's only lost about 150g and is still looking fat and healthy though.
im almost possitive he's WC because i got him from a pet store as an adult back in april of 05.