Many thanks for the guidance and the warnings. And noted that the updates may/will over write whatever I have installed.
I have 2 Nexus 5 phones. One has hardware issues but works as my Guinea Pig device for trying something new in uncharted waters for me.

Believe I read that the Oneplus installation for the 6T is recommended to be
with a device that is running Oxygen 9??? Please correct me if I am wrong.

Also, anyone successful in deleting Oxygen 10 and installing the 9 revision on the 6T to accommodate the installing of Touch??