I have come back to bodybuilding a couple of months ago after an injury to my abdomen, so I am regaining mass I had before, but in the past couple of weeks I think I have passed my previous best size.

I'm still boxing, just once a week instead of constantly. I cut this down 2 weeks ago.

I am currently gaining mass, albeit much slower than I have in previous, complete bulking periods. In the previous times when I gained mass, it was more or less junk bulking. I'd be eating pizzas, burgers, chips, etc as well as the rest. I was aware I was packing fat on and I was mindful that what felt like muscle would have had some fat around it too

Now my diet is clean and I want to get the gains, but keep it close to being as good a diet as possible.

I agree I definitely need more calories, but which ones and how much is where I am stuck! I am going to start logging what I eat.

For weight gainers previously, I just ground oats in to my protein shake and made it a weight gainer, I can revert to that again, I'm just at the point where I would like to know how much of each micro-nutrient I should be eating for my aim, bodyfat, mass and height so I can move from there and start looking at my log as I am making it and noting down where I am lagging.