Lately, I've been working on my half guard game. I get the electric chair sweep into stoner control, but as I do the roll over my shoulder for the vaporizer, I can never fully complete it. I end up laying on my back trying to complete the roll and then falling onto my side after a couple seconds. This makes it really hard (still possible) to finish with the submission. I would love any tips on how I could actually complete the roll to lock in the correct position for the rolling vaporizer.