About 10 years ago, I experimented with a layout invoving auto - shuttle units in 'N'. Whilst the electronics worked perfectly, the exercise was let down by the stock. I used three Farish 101 units, all had been run in, and all were a similar age. From hitting the trigger to slow down the train & stop it at a platform, one drew up well short, one stopped within the platform, and one overshot considerably. This was of course with the same controller setting. the relevant distances being trigger to start of platform 36", length of platform 36". I designed these as generous margins for a 2 car train of 10" max.
If I tried this again, would I fare better using three modern mechanisms. If so, which units contain state of the are mechanisms, and which the original stone age ones?
regards
CC