Originally Posted by MudSplattered
I thought about the motorcycle tie-downs, but none of us know how to use them.
It's moot point now that you have such a nice home-fabbed rack, but I'll throw it in here in case anyone else is mystified. Four bikes can go in with just two pair of tie-downs. Alternate bikes forward to backward (or two outer forward, two inner backward). Lash one tie-down to the ouside of each bike (shown in red) and then use a short tie (I use a small length of ski rope with a vinyl-coated hook - - shown in green) to lash between the two inside-facing handlebars fo the bikes. Here's a crude little diagram of two options:
