On another thread Ingorsoll mentioned loading a tractor on a trailer. The part that bothers me is he was going to use some cinder blocks to hold it up. Never use cinder blocks to hold a vehicle up! They can disintigrate,and the next thing you know is you are wearing the vehicle. Most people evn use them the weak way, flat surfaces up and down. If there is nothing else you can do and have to use cinder blocks, at least put the holes up and down with a two by block on top of the last block. I saw a Cararo fall when a block let go and the car had sat on it for a couple of days.