L.,
I don't have personal experience to share...but as a person who has read literally thousands of accounts from others...
...I can tell you that many people respond to a lesser than (what is considered to be a) therapeutic dose/increase.
So if you feel more comfortable just adding the 5, I say go for it...and just see if that does work for you as an individual. You can always increase again if needed.
With encouragement...you are on your way to your best plan.
S.C.