the problem with 1/43rd scale is the price difference between kits and diecast (ie Oxford diecast) ,i can see the attraction of the kits in that scale as in you could have various colour schemes of your own , as apposed to the colour supplied as a diecast ,as for 1/24,25th scale this was mainly used by the american kit manufactures as it gave more detail,airfix did make larger scale models in the past but like other manufactures had agreements with others manufactures to model kits as airfix ,the "monkee mobile" springs to mind made by amt