Well i've just ordered 6m of 25x25 16 gauge square hollow section. It came to a grand total of £22
Im hoping that its going to be the ERW stuff so that i know that that what im welding is the same stuff that the chassis is made of, i think i'll have a practise with it first and then make myself a welding trolley for my arc welder, mask and rods.
WH Smith have finally posted my build guide and i should have it in the next few days.