User blog comment:Blackendedsoul/Devil Fruit Limits and Physical Ability/@comment-1440995-20120122183623

The concept of devil fruit is really something Oda DOES need to explain better, so far, we have a fairly small idea of the fruit, he even tends to joke abou it, saying the fruit's limit in a measurement he invented (like, luffy beeing able to stretch about 200 gomu gomus, robin sprouting lmbs in a range of 200 hana hanas) but they always said that logias and element-producing paramecias (like magellan's, kallifa's and Galdino's) can produce near limitless, and so far, we have never seen a logia user tired after producing large amounts, they just do it without any warning, but some paramecias probably depends a bit in the user as well, such as Luffy needs to gather some strengh to stretch his arm further, as rubber is something that tends to keep th shape, while buggy seens to be able to split his part to the point of logia-like, but this fruit has a range limitation, we alol remember what happens when his body parts are too far (though poda said, its 200 bara baras, but still, it looks like 8 or 10 meters range I believe) an Zoans are turly fruits with rely in creativity and practice, as the transformation control is not easy at first, and transforming selective body parts seens toi be the most advanced technique (notice that I'm not including CHopper's extra transformations, as he do it artificially with his medicine, but the effects in ANOTHER devil fruits is something i'd love to see xD) I also believe pell was terribly wrong when he said there is a number of devil fruits that aloows you to fly, the number of logias already surpass this number (the logias of light elements) and all bird-zoans, also, the paramecias.