Capacitor For MM 4S

well i have a ?

i installed the novak cap i had and also put some holes in the case, and i also run a fan, and my MM has 18 fets, and it runs on 5s (did a quick test and it had a little cogging , didnt change my settings from 4s - which has no cogging at current settings and gearing)

this is in my xt8 with a 9xl

....?....is it worth really running on 5s for the few less amps that this will draw or stay safe and run it on 4s and not blow it up.....

thanks