What is the best way to transition to a mass gaining diet? What I mean is, I should probably increase my calories slowly, so as not to add bodyfat. I am 6'1" 185 pounds at about 9% bodyfat. I am looking to gain about 10 or 15 pounds of lean mass. I have no timetable and I do not compete. I have been training for about 8 years (with 2 years taken off in college). I have been back training seriously for 3 years and paying close attention to my diet again for about a year and a half. It has been awhile since I have focused on gaining muscle because I was primarily concerned with losing fat (and gaining some muscle). I tried to gain a little bit in the winter, but I feel like I primarily gained a few pounds of fat. I have been following the fat-to-muscle transition diet, with great success. I will probably continue to stay on this diet for a little longer. I was taking Ultra-40s and Lean Out, but I recently moved and money has been tight. I plan on taking some aminos and GS in a few weeks, when money is not as tight.

My question is, how should I go about increasing calories, and what sources? I read somewhere Roger said to increase by between 300-500 calories per week. If I am transitioning to to the Maximum Strength and Size diet from the Fat to Muscle Transition, should I begin by adding Mass Maker to my UMP shakes at meals 2 and 4 the first week? I am so concerned because I am more or an endomorph body type, and I can gain fat pretty easily. If the number were increased 300-500 per week, which calorie sources should I increase first (carbs, fat, protein, or does it matter?)? And how should I go about it?

Thanks for any and all help.