A new wheel arrived, so did the teflon treatment, whacked it in & realigned everything.  The wheels wore down the middle instead of the edges, but it burned a horrendous 460mAh/mile.  It never burned that much with even a brushed motor & stock suspension.

The gyro started glitching, so cleaned the contacts & it appeared to be recovered.  Washing the vehicle seems to get contamination in the contacts.  

Toed in by 1 turn & it burned 425mAh to go 1.17 miles before the servo started centering on a right turn.  The key does seem to be toeing in.  Maybe the forward motion pushes them out or the camber is still off enough to require it.  1.17 miles isn't long enough to determine efficiency.

Toed in another 1/2 turn & replaced the servo again.  Pots seem to go more often than brushes.  It could be water intrusion from truck washing.  The next 7 miles burned 3206mAh or 458mAh, so it could be the larger contact area on the tires.  2 miles of that were at 10mph, but still.