I had got a small utility trailer that i got for free. it was a 4x6. I replaced the main beam and added 2 feet to the back of it. What i need to do now is move the axle back so that the geometry is correct. It is now looks like the axel is in the middel of the trailer. When i move it back i also want to replace teh leaf springs. I was wondering if any one knows the math when it comes to the approriate place to put an axle on a trailer. Also what would be the best way for me to install the new leaf spring brackets. Any help would be nice.