I have tried the heating method, quite good results, but finally settled for lower nails, just 1-2 mm.. The problem is that so small, they are not that efficient.
I have observed recently that there may be room for a more natural way; After a shower, as happens to many, the hook almost disappears. Recently I had a daily walk to a mountain along a river (also got a bit wet), and my nails remained straight the whole day after ! Even though the nails were left quite long, I was able to play very smoothly! Looks again that hydration ( and what else? ) naturally helps to eliminate the hook ! I will try to focus on finding a solution around that root cause, that I mainly think it is hydration.
Paulino Bernabe Especial 2009
Ramirez 1A 1980
Alhambra Luthier india 2012
Juan Martinez nr 55 (the return @2014)
Yamaha cg 110 (as a kid @88)
student again since 2015, to my degree @..? - God bless!