How to weld parts in a Model if there are more than two parts?

I am very familiar with welding and I have been curious as to ask how to weld multiple parts if there are more than two parts in a given model. This is the script I have:

function Weld(p1, p2)
    local w = Instance.new("Weld", game.JointsService)
    w.C1 = p1.CFrame:toObjectSpace(p2.CFrame)
    w.Part0 = p1
    w.Part1 = p2
end
Weld(game.Workspace["Stage 2"]["Metal Spin"].RotatingPlatform, game.Workspace["Stage 2"]["Metal Spin"].MotorStick)

(By the way, if anyone asks if this is a LocalScript or just a Script, it is just a Script because why would a Weld like this one run locally, you know? I do not understand the mentality of some scripters these days.)