All new RTR PGA wagon in 4mm scale   Cavalex Models are pleased to reveal its first project, the 51 Tonne Hopper Aggregate wagon built by The Standard Wagon Company Limited, design code PG012A, for Redland Aggregates.   Over the past few months we have been conducting research and preparing for what we hope will be a popular choice of wagon to model.   This part of the modelling sphere, the four wheel aggregate hopper, has been neglected by the main manufacturers and so we decided to focus