Dbol only is not a good cycle. Most weight you gain will be water. Not to mention it shutsdown your natural production of testosterone. It makes you feel like crap. Horrible on your liver and its best used as a kickstart for a long ester cycle. 20mg is really low most people generally run it around the 40 range. Your best option would be like a test c or e cycle. Dbol only is just a horrible cycle