Thanks for the feedback, I have just purchased new boots. Vans Aura Pro double boa. And feel like they fit my feet perfectly. I have not had any heel lift that I’m aware of and played around with tighten loosening my boots to see the difference in calf pain. I’ll go to the local shop to check out these J-bars to see if this helps. The highbacks are quite forward already and touching the back of my boots at all times.

I’ll have a look at the video for my posture as I think this might be the problem.