[Tom Line]

We've used the sonic shifters quite a bit - we used two in our drivetrain and one powering our winch. We had a comp bot and a practice bot, so we had 6 in all.

We abused the one powering our winch to the extreme: we knew we were pushing it FAR beyond the design envelope with the forces were were shifting it under. We upsized the shifting cylinder and removed a stage so we could shift it into neutral. We routinely loaded with with 200-300 pounds and were releasing it.

We expected it to break, and it did. The shifting pin sheared and the dog gear rounded off the ears and the pocketed slots twice during the season.

The drivetrain shifters were installed and used as they were meant to be. The did not fail at all. In the off season we went in and had to change out the dog gears because the ears had rounded off.

We used encoders on them and had no issues.

Used as expected, we would recommend the gearbox to anyone.