I wouldn't second it (I refurbish drives routinely so I use totally different methods) - anyway, if you get in PM contact with the OP , explain him your idea and then PLEASE be responsible and answer DIRECTLY to all the questions and problems that will come out just in case.
The latest thing I personally would want to see here again is threads over threads of people whining because they read something and did it and it did damage instead of solving problems - oh well it's not my problem.

Side note : The SD box does a similar job but I can't tell what is going on on the drive during the "process" , one thing is sure : if you have a zone with flaky/worn out surface, you have a lot of slow access sectors and there's nothing you can do. Let alone if you have micro-radial scratch or aligned spanned scratch.
Factory reallocation of defects is a very complex process and it is the only thing that delivers a full working , stable and homogeneous access speed drive. Cosmetic changes involving the m0 commands do work only in one case : you have drives with only soft-ECC errors, correctable errors / blocks that can be "slipped" without problems and NO physical problems. Of course you have the defects added to P-list only (G will be of course clean). The NRG has another, well defined purpose.

I received drives "fixed" (so they said) with m0 thing, the problems came back with a venegeance few months later. But I still have one, that is OK except some areas where m0 command doesn't work properly : it ends abnormally maybe due to overflow. I can put back the original modules, configuration pages and ROM so I am willing and open to try your method. If it works and after 1 week of intensive continuous R/W operation, it is still OK, then it is interesting, so if you want you can PM me and we can try it "live" even on remote support.

At present I see no alternative to retune / write pack W2W / scan & zap & build log. THIS works and give NO problem after intensive use. Let me know.