Thank you for that snippet of code. I was not aware of that. I will add that to my i2c_scanner sketch.
Yes, using 3.3v LCD's would be a good option. However, I am 'invested' in too many 5v LCD's at the moment. In truth, only recently did I become of aware of the low voltage LCD's. When I deplete my 5v LCD inventory I will purchase the 3.3v variety and save myself a lot of extra work.
I appreciate your help.