Thanks jim. It's probably obvious I'm new to this sorry.
I went from worried about my knee while doing a shaky body weight squat around Christmas last year, to squatting body weight on my back not long ago using the 5/3/1 as my main strength/size exercise. First deadlifts were 60kg, now up to 110kg for 5.
I put other activities on hold this year to strengthen it back up and now it's much stronger.