Collision Model strange offset in GMOD

[vapid glade]

Hi, I'm trying to import some models in GMOD and they're working fine (texture is still missing, I know) but I have a problem with the collision model.
In Blender the phys model is a simple cylinder (with smooth shape and convex hull) and is exactly over the model.

But when I import it in GMOD the collision model is completely in a different position than what it was in Blender, as if it had a strange offset.

This is the qc file:

$modelname "props\big_hourglass.mdl"
$scale 1
$body mybody "big_hourglass.smd"
$staticprop
$surfaceprop "glass"
$cdmaterials "props"

$sequence idle "big_hourglass.smd"

$collisionmodel "big_hourglass_phys.smd" {
$mass 1000
$concave
}

what am I doing wrong? Thanks for help

[latent tundra]

Looks like your object origin is in the wrong place. Try applying all transforms to your collision mesh and your base mesh in blender before exporting

[vapid glade]

sorry for dumb question but how can I set or see the origin of a mesh?

[latent tundra]

This little orange dot

[vapid glade]

oh you're right

they have different origins

I'll try now but I think that's the issue, thanks ❤️