The reason i mentioned the runway lighting is because BAA have called us stating they didnt want our tugs salvaging a stricken aeroplane from the runway due cradle damaging the lights... Of course its a low chance of it actually happening but we have also had the tugs cradles software throw the systems out of sync as a result of not pushing just off the line or in-between the lights.
some-times we have problems connecting the tugs during airstarts due to the Fixed ground power being in the way. Therefore some drivers wait until the engine has started, and then connect to the aircraft, which hasn't been a problem