Although I’m probably missing something, because then row 3 column 5 would also have an alt solution
Right. Splendid job. These T's are quite the pick to work with. You clearly know your stuff, so I'll ask you, do you think I should scrap the T, offer multiple solutions or invent a symbol which allows numbers to be in a quantum state between values, or something else? I am quite new to making puzzles (this is my first time), so I am clueless. Much appreciated for all the work done so far. By the way, to make my life easier, I've written a python program to find all alternate solutions to the T problems. Quite eye opening, want the script?