Thank you for the advice. I thought that I would get someone query why I am laying the track on top of the cobbles. The layout I am creating is a small shelf layout that I am calling my 'Winter Project'. I know that the cobbles should be just about level with the top of the rails but for this exercises it is, to me, of no matter. This shelf layout is in N gauge will be a dockside scene. It's construction is more of an exercise in modelling a dockside/harbour as I plan in the new year to model a much larger OO gauge dockside in my garage along with with my other two layouts.
Anyway, thanks again for the tips.
Greg