I did a TC back in june for a customer and was quite pleased with the end result but had to use ratchet straps to get everything to line up well so I could tack everything in place before measureing it out and finish welding...Very very accurate dimensions!
http://chopcutchop.blogspot.com/2010/07/put-in-some-work-today.html
http://chopcutchop.blogspot.com/2010/07/put-in-some-work-today.html