Need help with attaching an model to a BodyVelocity Train (via welds)

[SmilingMousey (Mousey)]

Hey all!

I have this train model here of which i am trying to attach to this bodyvelocity train via the base part:

I have tried stuff like QPerfectionWeld, WeldConstraints, and even PrimaryParts of the Model, but whenever i try to move with these added, it goes really slow, like this gif:
https://giphy.com/gifs/8dtzy00vU1r6Gx2vxB
And this is the gif of how the train is actually meant to run (running without the model attached with the methods said above:
https://giphy.com/gifs/9x5QQzSGkVlA9G2o4X

Here’s the train model from @Real_BenTheMiner:
https://create.roblox.com/store/asset/5796009438/FREE-BodyVelocity-Train-Chassis

Does anyone know how to attach a model or its parts to a bodyvelocity train without it being slow and not moving and all that?

[awry_y (Charlotte)]

Do not use body velocities, they are deprecated and don’t work well, I recommend using Align Position.

[SmilingMousey (Mousey)]

I don’t even know how to convert the kit I already have to AlignPosition.

[Scottifly]

Check the Massless Property true in ALL the Parts/Unions/MeshParts of the added train.
Sounds like the train is slowing down because it’s heavier.

While you have them all selected also make the CanTouch Property false. This helps by keeping the Roblox engine from checking to see if the Parts are being touched when you have no Touched events being created by them.

Also there are a lot of helpful train/cart threads on the forums that can answer questions you have.

[SmilingMousey (Mousey)]

thanks! that made the train go fast as it should!