Rolling Road.

I have extolled the virtues of the Bachrus rolling Road available from Finney and Smith- click on link on th left. The one shown here with one of Phils locos going through its paces, will accomodate locos from 'N' gauge through to 'O' gauge. This is particularly usefulif you dabble in other scales without the need to buy a road for each.
The advantageis that you can leave the chassis working away whilst getting on with other things and you can keep an eye on it.