Quest 3: why should I buy a battery headstrap when I can 3d print a battery holder?

Title says it all. 3d printing a battery box, and hanging it on the back side of my original elastic headstrap seems like it would solve all problems.

The battery would be a counterweight against the headset pushing on my face. I can get a bigger battery for less money. I get the satisfaction of making this myself.

Is there any drawback to this?

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As a side-note, I also notice people were creating more 3d printed accessories for the quest 2 than quest 3. Maybe the quest 2 generation were the early adopters that have a different approach to new tech, more innovative :

Technology adoption life cycle - Wikipedia https://share.google/4qlWHmFXrvmCTebe9