Right now I just have a 5" senko on my lews speed spool and I've adjusted the spool tension and then set the mag brake to about 7.  If I was going to change baits and say use a spinner bait, do I need to adjust the spool tension again or just the mag brake?  Or both or neither? 

I adjust both the spool tension and mag breaks depending on the weight of the lure. 

A spinnerbait typically needs a little more braking or thumb at the end portion of the cast due to the wind resistance. Senkos fly pretty well. Might have to click the mag up a couple.