Tongue weight is:
7560 - 6720 = 840 pounds
Total trailer weight is TW + trailer axles:
840 + 5100 = 5940
TW % is 14.1%.
Your front axle lost 520 pounds when you dropped tongue on ball. Your WD restored 240 pounds of that, just under half. I agree with Bedlam in restoring more to front axle with a goal of 100% or back to the ~3360 pounds unhitched.
You are under all your ratings by a fair margin, so it may drive well even with no WD.
If you have the OEM round tube receiver, then I recommend saving up for the
Curt XD which can be found for under $200 shipped.