You need carbs to give you energy and to assimilate the protein that you take in. Without enough carbs, you would burn the protein for energy. So for example if you take in 4000 calories, with 50%protein, 40%carbs, and 10%fat, that would equate to 500grams of protein, 400grams of carbs and about 40 grams of protein, which is the number of fat grams in which i specified in my original post. You need more carbs than protein so you can use enough for protein synthesis, and for energy. Carbs are used not only for energy, but for protein synthesis also, not enough carbs, a percentage of protein that you take in is used for energy, so that the 500 grams of protein that you injest, say 300 will be used for muscle protein synthesis, and the rest for energy. Your body uses the food that you take in for energy, wether it is protein, or carbs, or fat, and with 10%fat, that is not enough fat to be used for energy. With your diet, the protein that you take in, a large part of the protein is being used for energy, and not for protein synthesis, and defeats the purpose of taking 50% protein. So as you can see, the diet you have just outlined is similar to the one in my original post, but with the carb ratio to protien ratio are reversed. In my original post my protein was 40%, carbs 50%, and fat was 10%. Same figures as yours but reversed. Now as far as training goes, you have to train to your particular bodytype, you claim you are a ectomorph, so you have to train your bodytype accordingly. Diet and training go hand in hand. If you have the right diet, with the right training, you will grow like a weed. I went from 148lbs to 232 naturally in 4years naturally, with no AS. I am a classic mesomorph, even that is not enough to classify my gains to being one bodytype, I ate and trained according to my bodytype. I am now 275 after two cycles with my body fat around 15%. I am a big mofo, due to training and dieting properly. Remember knowledge is power, the more knowledge you have, the better bodybuilder you will be, or lifter or whatever it is you are trying to achieve with your body.
A good book that might help you is Championship Bodybuilding by Chris Aceto for your diet, Encyclopidia of Bodybuilding by Arnold Schwarzenegger, Blood and guts by Dorian Yates, just to name a few.
I hope this helps you, and Good Luck.