Thanks @Shmexysmpilot

A quick explanation on how to use them: they'll push the CoM away from wherever they are placed, and the distance from the CoM determines how far they move it. If the weight is placed far away, there CoM will move a lot but if it is placed close to it, the CoM won't move as much. And obviously it makes the plane lighter too

clickety click

@Shmexysmpilot wwwwhhhhhhhaaaaaatttttt

If you need your helicopter to be lighter you can also use negative mass fuel tanks

I know but I haven't found one strong enough yet @Shmexysmpilot

You can search helicopters that other people have made and take theirs. There are also scaled props that people have made

I'm on ios just so u know