Dreenn,
For all the suggestions and opinions, the decision comes down to two basic facts.
1.) The math – If your best guesstimate says you are at or near your TV limit, hitch it up and head for the scales. The numbers are what the numbers are. Chances are you will be close or a bit over your max cargo.
2.) The cost to change TVs – If you find you are near or a bit over the TV limit you know you can buy a bigger truck or, you have to be mindful of the amount of cargo you carry in the TV. You might have to shift some items to the TT.
If you know that a new TV is not in your future, then you will probably do what others do and use what you have. You are the only one who can decide if your TV and TT combination suits your needs.
Also remember that those "neads" change with towing experience.