I have a Memorex FortyMAXX1248 and I convert in LTR-40125W with a VS02.bin . All work fine and I burn at 48x without problem. 
Yes, I’ve done the same myself.
If somebody want to go back I’ve the backed up firmware in my collection.
I have a Memorex FortyMAXX1248 and I convert in LTR-40125W with a VS02.bin . All work fine and I burn at 48x without problem.
Yes, I’ve done the same myself.
If somebody want to go back I’ve the backed up firmware in my collection.