Attachment makes part heavy

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#1

I made a script to attach the first player to the second one. And for this I create an Attachment, everything works, but Attachment makes it heavy when Massless = true
Mass
.

RobloxScreenShot20220616_175646174 (2)
RobloxScreenShot20220616_175646174 (2)698×392 248 KB

The Attachment is in the HumanoidRootPart, I read on DevHub that the root part cannot be weightless, but when I move the Attachment, the HRP becomes not weighted, but the part in which the Attachment appears weighted.

Is it possible to make the HRP completely weightless, for example by changing the Attachment settings?

I am using PrismaticConstraint.

#2

can you make the part that Attach, massless?
and turn on custom physical to set the density to 0?

#3

When Massless = true, part remains weighty. And CustomPhysicalProperties works very strangely and it is desirable to remove any mass at all (the minimum density is 0.01 and the mass still remains).