Thanks for sharing that letter Pootler, welcome
I feel for you, your mom is stuck in an unhealthy situation & I sincerely hope that letter will help empower her.
I dont have any idea how my family still in the borg will take this "generation change", I'm sure they will swallow it whole and be grateful for the great "spiritual food". I know that I cannot ever reach my mom on these doctrinal issues, she has been a JW since the 1950's (seen all the 1975 crap) and still wholeheartedly believes it all- she is older and getting infirmed now, all she has lived for is the end of this system of things and to see the new system- I cannot reach her & in her delicate state I am not sure if I want to, I think- let her go believing she has done all she can and with the resurrection hope.
It is sad to think of what a waste her life has been, she was once vibrant, witty, a real firecracker....
That is why it is my hope for you that your efforts bring you some good results, good luck to you & keep us posted!
CHG