The Hachette Mallard is a good basis for an A4 but works out very expensive. I have used the body/nose/skirts and the frames - doubled up to produce a strong chassis. If you want to run your model avoid the hachette wheels which are very poor. The biggest saving can be made by buying an A4 corridor kit. I eventually got one from William Ascough, Ace Products, but it took 4 months and I ended up having to launch a case in the county court against him to get it.