Hi Mate

You're about ideal at the moment. You also might be pleased to know you have great genetics in your upper arms, chest, and upper back for muscle gain too.

Do it properly, don't eat crap, work hard in the gym, rest hard out of it, and push your calories up slowly.

Might be worth getting Richy23's attention to. He has the diet thing down to a fine art and can show you how to eat to gain the lean stuff without adding unwanted fat.

Good Luck!

Anthony