When I bought my FS this summer, the seller threw in a sturdy little A-Frame stool type thing on which the hitch end of the trailer sits when not attached to the hitch. (My trailer doesn't have a jack). It's just about the same height as the ball hitch but slightly higher so when the truck is backed up to it, it can just be lowered a few inches onto the ball. It's nicer and lighter than a cinderblock which is often used and when I take off I throw it in the back of the truck. This also serves as a quite handy little step that I use to get into and out of the Scot while it's on the trailer and I am rigging her. If anyone wants to see a photo of this, please e-mail me.
"If the sea did wild or wicked things, it was because she could not help them." - Hemmingway