So I messed up. I could not resist the temptation to keep training with people at my gym. I went back to training with volume and have seen ZERO improvement for the last three weeks. I feel like an idiot. Heavy duty training is clearly doing things for me that nothing else has ever done, so it's back to HIT for me... I will update in three more weeks. If I see more gains, I will be sticking to the heavy duty principles for the rest of my life!
I did the same when switching from a volume approach to HIT, but the more you educated yourself on the matter, the more of a relaxed understand you'll develop. Keep up the good work:)