Bonemerge Tool not placing objects on model correctly

Whenever i use the bonemerge tool with any object, it automatically merges it with the center of the ragdoll, and doesnt stay in place. How do i place it on a specific part of the model? I’m using the version here ->


As far as I’m concerned, the BoneMerge STool only works with the right rigs on the right models, i.e TF2 Hats on TF2 Ragdolls.
I don’t think the miner hat is rigged to fit on a player.

Thanks! I realized i didn’t have many “wearable” items installed so i downloaded all the TF2 hats and wearable items off those should work right?