It's been a while and I know I did the math right and it makes sense but a part of me keeps thinking I may have screwed up lol.

If I want to run my san ace between 7V-12V.

V=IR

so amperage draw for the san ace is .52A

so to run 7V I would need to have a 7/.52A = 13ohms, 12V/.52A=23ohms so a 10ohm resistor or a pot will do correct? I'm trying to find a diesel pot that can run 3 san ace or better yet one that can handle 6