I'm in the same boat as you. I like Shockwave, but I'm trying to gain weight. I have tried Heavy Duty, which is specifically for hypertrophy(size). Beware though, it will beat you down lol. At least it did to me. Plus it's optimal to have a training partner. Though you can definitely get around that, I think a few people here have done it solo.I stopped doing it only because of my schedule. Now I'm trying to modify SW to be more hypertrophy oriented. One of the members here, Trevorxgage, has mentioned recently that possible modifications to enhance the hypertrophic benefits could be to perform extended PSR sets(decrease the weight increases per each mini set), or just perform more PSR sets.