I think Joel Smith tried that German Volume training last year using front squats or something. I think he posted it on his blog. I think it was like Jumpcoach.blogspot.com or something. Any kind of size to muscle will definitely help with max strength, maybe not directly, but when you dedicate more time for max strength/explosive strength later on it will help. I've never tried it, but see if Joel Smith will tell you how it went, he's on this forum sometimes.