How would I prevent particles from going beyond when a part resizes?

[Hazelfluff]

Like if you put the particle emitter in an attachment and put the attachment at the end of the part or wherever you want the particles to come from. You could rezize the part and the attachments would be unaffected. Attachments can’t resize as they are (implied) one-dimensional so the particles only come from a single point and therefore when you use the LockedToPart property the particles will move.

Or looking back on this idea

@Hazelfluff

Another potential solution is instead of resizing the part you just duplicate it but with a new size, and delete the part that had the previous size therefore also deleting the particles that would linger. (probably not the most optimized option + not sure if it would actually work)

instead of deleting the part, move it. and since LockedToPart is true. The old particles should move with it.