This guy really isn't getting it. If you take the platters out of a drive yourself, you lose all chance of recovery 100% guaranteed every time.
DON'T TAKE THEM OUT, EVER!!!!!
I run a data recovery company, and we only remove platters 1 or 2 times per year. It takes expensive, specialized equipment, and still hardly ever works. The only reason to ever remove them is if the motor has failed, and can't be repaired in place. We actually will resort to replacing motor bearings surgically to avoid removing platters. Yes, it's that important.
Your questions reveal that you are extremely unqualified to even be attempting this level of data recovery. Either seek out pro help, or just scrap the drive and save yourself the time.