It's fixed!
I shall really thank Ferrix97 here for the wonderful job he has done recapping my LC! 
As it turned out, he lives pretty close to my place - so after almost three weeks spent arranging a meeting, finally I gave him the baby last Saturday to have it fixed. Guess what? On Monday evening it was done!
I also got the occasion to give him my two damaged Macintosh Pluses for troubleshooting, he's a really nice guy and works very professionally for his young age!
I know most people on this forum are US based, but for those who should happen to live in Italy or nearby countries and need a recap, I can strongly recommend him!