If you do follow trails again, might I suggest SteemRewarding? It offers all the features any of the others do combined, and also allows you to create a downvote trail to follow if you want.
It's the only autovoter service I use, meets my needs and the parameters you can set for voting rules are great and allow me flexibility I could not find elsewhere.
When I want to get a handle of my VP, I just go to my User Settings on Rewarding and set the "Pause all votes when VP is under:" to 100% which basically pauses all my voting rules at once until I lower that value again (you can also pause your rules individually but it's easier to just stop it ajj)