has anyone ever built a homemade livestock trailer? i am currently building one (4' X 8') and have just gotten the frame finished. next comes the axle. what problems did you have getting the axle square to the frame? did you buy a factory made axle or car axle from a wrecking yard? has anyone had any expierence building an axle? i know this is a lot of questions, but i am new at this and trying to get some information. any tips on this would be greatly appreciated.