I think squatting 3 times a week is a little much. By the 8th or 9th week my squatting strength actually goes down because my knees become weak. They don't hurt, they just become weak. It's hard to explain. I know I'm going to be the only one, but I really think squatting 3 times a week is over doing it. I think the concept of compound movements to gain weight is a better idea. For me, nothing in the gym really matters. As long as I work out hard and focus on compound body movements it is all the same. All it comes down to is how much I eat, and that is all.