After discussions on the relative merit of rockbacks, I decided to video the rockback up close. It wasn't the easiest operating the camera and attempting to clamber up the mounting block...Loly kept doing what he was taught and lining up bless him

Anyway, I got a clip from above where you can see the lift in the lumbar region, and a clip from the side which I think shows a different look to the spine than the clip I posted the other week. Finally managed to get someone to stand on the mounting block and video from behind which is quite interesting to see - if you watch the liver spots on the right, you can see more 'quarter' appearing as he rocks if that makes sense!!
I know this isn't everyone's cup of tea; please be aware that this is a work in progress and I know he overbends somewhat.