I do love a Parkside Dundas kit and have built a few. More detail than your bog standard Airfix affair and very satisfying, as you say, to see something trundling round the layout built by yourself.
Cambridge Customs do sheets of decals for Airfix and Parkside kits allowing for multiple running numbers, etc to be applied. If you are doing a lot of kits they are very good value for your dolla’.
Paul