Yes ok on the exactweld pipes. A friend of mine has a set of L pipes that I think were made by exactweld. I am pretty sure he had someone copy them for him a few years back but unfortunately the copies didnt work as well as the origionals. I will have to try and remember to ask him about them when I next see him. Pretty sure the exactweld pipes were blown pipes.
Hope I am right here, but I think "tassie tz " is Grant. If I am correct you came over and rode a kr350 in some icgp rounds in 2011. Hope I am thinking of the right person but please excuse me if I have got my wires crossed so to speak.