Honestly man, leg drive is the most difficult thing to learn when benching, at least for me and a lot of the people I have spoken to on that subject. It's not something you can really practice and get tips on through reading. It's really something you learn by watching those who have learned it, and then incorporating it into your muscle memory. I am to the point where my legs will automatically engage when I press, where before It had to be a conscious effort and took verbal commands from my training praters. I would go to EFS and to the Q&A section and post the question there, one of those guys may have a solid way of coaching you on how to get the leg drive. good luck, looking forward to the updated videos.