I had FHC around 1980, so the CITH indult was still young. As I have described, we were taught to receive in the hand, and we were made aware that COTT was an option. They did not spend a lot of time on COTT catechesis, but I knew how to receive that way, but I never bothered, because it seemed everyone else did CITH, and why change what works?
Only much, much later did I learn the truth about CITH, and this truth moved me to change my mode of reception. In fact, not soon after I began receiving on the tongue, I began kneeling as well. I cut that out after a year or two. Frankly, it was just too much trouble.
On the tongue, in the hand, these are not hills I will die on. If a bishop somehow prohibits one, then I will receive with the other. I will still make an issue when the bishop clearly doesn’t have authority or approval to legislate such, though.