I wish it worked that easy, I really do.
I am rolling since Oct 22 2018 and still haven't gotten results. Started with 1.5mm, quickly worked up to 1.75mm, and now I am at 2.00 mm since beginning of February. Needled weekly (with the THBP electric pen or whatever it's called) till beginning of February 2019, now needling every two weeks. I apply minoxidil 5% once a day.
Zero regrowth so far, neither vellus nor terminal. Needled areas are always full of blood after a session (though the last month less so, don't know why, as needle length is still at 2.0 mm)