Trail not appearing despite seeming being setup correctly

[SkrubDaNub (ComradeSkrub)]

I expect the trail to… actually appear. But as you can see in this video, it doesn’t.
robloxapp-20230212-1751527.wmv (271.0 KB)

Here is how the trail is setup:

Here are the children of the part the trail is parented to:

Am I missing something?

[Crygen54 (Crygen)]

The trail larger size is also depending of it’s attachments positions, if they both are at the same position (0,0,0), the trail larger size will be 0 so it won’t appear.
Let’s try to set one attachment position to (0,1,0) and the other one to (0,-1,0), it should appear ^^

[SkrubDaNub (ComradeSkrub)]

damn, I forgot about that. Cheers