Congrats on the successful training! My pup doesn't pull either so I just needed one that was comfortable for him on long walks and that had the velcro for patches to train as a hospital therapy dog. I got this one on Amazon and it has worked great: https://www.amazon.com/gp/product/B07TQHKDV2/ref=ppx_yo_dt_b_search_asin_title?ie=UTF8&th=1

We were once attacked by some stray dogs and it was strong enough for me to pull him behind me in a flash.