While not using 027 track for a while, I am using 031 & 042, I would suggest adding at least two more lockons. Also worth checking into are track clips, both 027 & 0 gauge have track clips in Lionel's regular track, that go under the track and help keep it from pulling apart.
I have had some very bad power losses with 031 track, even my multimeter would not pick up the power loss, I added more power clips and reduced the power loss. Newer track tends to have less problems with power loss. To close the rails on most track all that is needed is a pair of needle nose pliers.
One other related note to mention is that an engine with smoke will add dirt to the track a whole lot quicker than a non smoking engine.
Interested in southest Pennsylvania railroads;
Reading & Northern, Reading Company, Reading Lines, Philadelphia & Reading.