Hi Bjorn! Here in Brazil, the thinest square tubing is 20 mm wide, because this kind of tube is made by bending a plain steel blade and welding ("sewing") to form a square/rectangular tube. 10 mm wide tubes are made by extrusion, i.e., they don't have the joining weld. I've used 30 x 20 x 0.9 mm, because it is lighter than the 1.5 thick. []'s Eduardo Ypê Bike: http://www.ypebike.cjb.net/ Ypê Mono: http://www.ype.unicyclist.com/ ----- Original Message ----- From: Bjørn Harbo To: python Sent: Thursday, May 06, 2004 10:11 AM Subject: [python] Tubing/welding Hello all, I am a new member and thrilled by the thought of building a Python. My metal work experience is minimal and I have a few questions: I am unable to find (here in Oslo, Norway) tubing in the size 40x10x1,5 mm. 40x20x1,5 and 30x20x1,5 are available. What to choose? Secondly: I have an extremely simple buzz box type welding machine. Would it be sufficient or do I need the fancy stuff? Bjørn --- Outgoing mail is certified Virus Free. Checked by AVG anti-virus system (http://www.grisoft.com). Version: 6.0.677 / Virus Database: 439 - Release Date: 4/5/2004