I have recently changed my method a little..... I use one long 10000lb chain in the rear, I have 2 channels to run the chain threw, so if it ain't quite straight on the trailer, the will still have equal tension.... I also put some 1x2 chunks of wood on the trailer in a place that will let me know that its forward enough to hook up the chains, it keeps the car from rolling back also......
Front is like Keycom's, welded ratchets in line with tow hooks, there is only 2 straps to loose! I am thinking about running a safety chain in the front, just in case......