my legs come way down does anyone build a set of blocks to put under jacks. someone told me it is unsafe because it could roll off. I am thinking of cutting 2x4x12" and make them about 8" tall
We use a chunk of 2x8 to keep the legs out of the mud and water but beyond that why bother?
Yes, if you do a pull test when you hook up (and you should), if it's not hooked, it has a good chance of falling off. With a 2x8, the trailer can't fall far.