Legs for me is not about how big can they get. It is about how little fluid is in my knees. How stable do they feel? Can I snowboard? Can I mountainbike? Can I run? Are my knees stiff do they feel like they can move? Do I look like Ronnie Coleman going upstairs? Can I walk. Those are my primary concerns after that it is all gravy.
fluid in the knees does not mean extra size on stage.
Semhanktics at work...."I think I can add more size"....
1) even .001mm is more size - you wouldn't be wrong
2) even if you don't, the fact you THOUGHT you could do it doesn't make you wrong.
You said yourself that your knees are not stable with stairs...incredible specimen you are!