5BLD
Legend
My brother won't learn one of the big four and insists on staying with LBL(he has been cubing for 8 months btw).
Yeah, I had this problem with one of my students where I was teaching him Petrus. He blockbuilded using beginner algs. Like the 8 move edge insert instead of an F move.
That's why I have taught all my students a speedcubing method from the start.
Yeah, introduce him to blockbuilding, maybe rotationless edge inserts with M moves etc. Then slowly introduce him to blockbuilding...