Gaining 20lbs will be tough, but I will not rule it out. It will depend on how long you take the cycle, you can run the M1-d in upwards to 8 weeks, and I would personally throw the Liquid Masterdrol in towards the end for the remaining 4 weeks. Lean gains can still be made while taking either the liquid or pill form of Methyl Masterdrol (Same Compound), but its used more towards leaning out and gaining strength. Now with this being said, there have been tremendous gains made, but this obviously comes down to your training and most importantly your diet!