Having just completed a model of the Sherman Firefly Vc I was intrigued to see that each track came in 6 parts which were individually glued to the wheels rather than the rubber/vinyl tracks which need gluing or heating. The former did require some familiarisation to make sure they were placed correctly and provided a coherent, connected track but, in my opinion they look really great. The latter I always find a bit hit and miss - they rarely look good all the way round and they never feel entirely 'convincing' i.e., that they aren't going to come undone at some point. However, the ones on the Firefly seem to be set for eternity. I very much hope that this is now the preferred option from Airfix and that we can expect more of the same going forward.