Barry, i flew 10 min (just to be safe) and used about 9-10 oz and yes it is the stock tank (i think its 14 oz?)not much more than the 100 so imo its pretty economical

Rob, man is it ever gonna quit raining, i keep an eye on the weather and man that sucks up there[:'(]
but you will love the 125, i do and will fly a fly for you today