Great news Andrew, are your flat packs seamless tube or ERW? Don't want to sound dramatic but I'm putting my sons life in this car and I want to do the best by him. If bike frames are made with seamless surely a car frame should be made with seamless, or does the mount of steel used in conjunction with triangulation resolve this. Sorry just a bit worried about frame strength. Some one at the local suppliers said it would be a good idea to tig weld it for strength while someone else has suggested purging the tubes with inert gas to improve the internal weld strength. I'm sure some of the above is unnecessary but just need some reassurance really as to the details. The saying "A little knowledge is a dangerous thing!" springs to mind.
HELP!
Matt, I am so tempted to I really am. Can't imagine my son being to keen to help cut steel by hand/grinder.