If it requires you to do another sitting, then NO – it’s a waste of time and money. Go help you parents that day. Your transcript (I assume) already shows your academic ability and breadth of ability. This is akin to the kid with 2380 SAT going to sit for the ACT, hoping for a 36. Superfluous. Irrelevant to colleges since only GTown colleges require three AFAIK. Congrats on your 790 + 800 to date. You’re done.