That was a well written letter.
I hope she responds accordingly and agrees that researching the WT using their own literature does not ammount to apostacy per se.
I hope she responds with love and acceptance. The love of a parent child is unique and special.
If she doesn't, hold the love you have for her in your heart and keep the memories of past times alive.
Don't become bitter. Live your life as you have chosen and be happy with the peace that you have without the JW rules and regs to curtail your right to be you!
I wish you all the very best
HOTB