Way back in time, when I had a G outdoor railway I bought a couple of Piko kits and a couple of Pola kits. Even during construction, before they even met the great outdoors, it was blatantly obvious that the Piko kits were a) too flimsy and b) too small (put a LGB figure nest to a doorway) whereas c) the Pola kit was far more substantial and even the right size - they even used an interesting pin and hole system that was really strong and (almost) negated the the use of cement (oh yes, why did Pola make G cement? And I still have some and use it under certain circumstances) So there you go.