I'm a new boy on the block. I'm trying to decide which material to use. The Warrior plans say 1.5 inch 16 gauge or 14 gauge for a stronger build. My estimation is that the difference is about 3.3lbs or about 10% of the total bike weight. Add the weight of the rider and the difference you are pushing is extremely small. Has anyone built a 14 gauge and can confirm this or tell me I am wrong? I'm not very heavy 78kg but I have friends who are which is the problem. I like the idea of gussets but agree that you just push the stress to the weakest point and I don't want a patchwork of gussets and reinforcing plates chasing chassis cracks. Thanks in advance for the help. I will have more questions later but choice of material is the starting point.Hey Mates - Last time I was on this site was 2008 - Back again and looking to build a "WARRIOR LOW RACER TADPOLE TRIKE" - Can I use alum square tubing instead of steel? - If so what size/thickness? - Thanks for any help Docbob.