I... I think I love you.
This has been driving me crazy for a few days. Your suggestion worked out perfectly! Thanks so much for your help!

Thanks for the reply, I'll try that now and I'll let you know how it goes!

So, I'm pretty much done completing my hat - the only thing missing is a jigglebone I want to include. I followed SgtR007's tutorial https://www.youtube.com/watch?v=JP9ce_ygeSA down to a tee more than a few times. Everything goes great until I get to the 6:44 mark... At this part, I would open up Source SKD itemtest to compile everything, then open the .qc file, but it looks so much different.
Here is the exact process I go through:

Once finished with my model, I export it as an SMD.
After that I export two more LODs to the same folder.
Then I launch Source SDK, then go to itemtest, put in my LODs and .TGA then compile
Once compiling is done I go to "Explore MDL Content Dir"
Then I open my .qc with notepad++

Then I put in the Jiggblebone code, save, and compile the .qc with GUIStudioMDL. This is the result:


//
// TODO: parts/dmx ?
// TODO: $surfaceprop is hardcoded
// TODO: Is .mdl extension required?
//

$upaxis Y
$surfaceprop "metal"
$modelname "player/items/soldier/0x05df7880/jigglebonetest/JiggleBonetest.mdl"
//
// TODO: Can fps 30 be removed?
//


$body body "JiggleBonetest.dmx"
$sequence idle "JiggleBonetest.dmx" fps 30

$collisionmodel "JiggleBonetest.dmx" {
$automass
}

//
// TODO: FIXME, switchvalue is just LOD * 6
// 2959 : itemtest.cpp
//

$lod 6
{
replacemodel "JiggleBonetest.dmx" "JiggleBonetest_lod1.dmx"
}

//
// TODO: FIXME, switchvalue is just LOD * 6
// 2959 : itemtest.cpp
//

$lod 12
{
replacemodel "JiggleBonetest.dmx" "JiggleBonetest_lod2.dmx"
}
$jigglebone "jiggle_1" {
is_flexible {
yaw_stiffness 100
yaw_damping 5
pitch_stiffness 100
pitch_damping 5
tip_mass 20
length 20
angle_constraint 90 }
}

Upon launching HLMV and even TF2 after compiling, I see no movement in my hat whatsoever. I have no idea what I'm doing wrong. I've tried Googling the answer, but I can't find anything helpful. Sorry if this topic has been addressed before, but I am totally lost on this one.

Using Blender 2.67b-windows32

Thank you!

I know that I can add thickness to my hat via the "Solidify" object modifier, but my problem is that when I apply the modification, it nearly doubles the amount of faces on my mesh (it adds faces to the inside of the mesh for some reason). If I don't click apply, and still export the mesh, it applies Solidify anyway. Is there any workaround to this that isn't tedious? I'm nearly finished making my hat, and thickness is one of the last things I need to complete it.

Thanks!