Well i guess it might be easy for some, but im having trouble, where would you suggest to add a pot for a "speed" control / Pitch control, hope someone is able to help me, with this blurry picture :)
Its a Hasbro Yoda Lightsaber.
Kind Regards
(https://imgur.com/a/QnO4AT5)
https://imgur.com/a/QnO4AT5