www.makemkv.com

by bu40n you mean LG BU40N, which is a laptop blu-ray drive?
does it require to have a certain SVC code or something else very specific, like it is suggested here in the case of the BH16NS40 - https://www.myce.com/news/the-ultimate- ... ive-83254/ ?

I read about LG WH16NS40 as being good for bluray ripping if firmware gets downgraded. But I can't seem to find that model. Instead, I can find LG BH16NS40 - is this model any good?
Or what other models are most reliable?