2x Black Belt Pan Champion Luiz Panza shows his unconventional way of doing footlocks. Some call it weird, but he gives a great explanation of the details he uses and why.
Luiz is one of the best guys in the world at getting footlocks. Check out his DVD “Hidden BJJ Secrets” Also available ondemand. https://bjjfanatics.com/products/hidden-bjj-secrets-4-dvd-set-by-luiz-panza