Pallet Physics Being Weird

[DaDude_89 (KasCode)]

Plain weld info: Weld | Roblox Creator Documentation
WeldConstraint info: WeldConstraint | Roblox Creator Documentation
ManualWeld info: ManualWeld | Roblox Creator Documentation

Difference between WeldConstraint and Welds:

Are there any differences between WeldConstraints and Weld?

What are the difference between Welds and WeldConstraints? Are there differences? What are pros and cons to this?