mat60 wrote:
....snip...
I guess another stack of Lynx will work but it seems like the jack foot could slide on the plastic.
A friend bought a single axle Lance a couple years ago, and had the round foot of the tongue jack slide off the top surface of a lego block one day when she failed to get the tires securely chocked.
Not sure if you can see what I've done here, but I cut down the inner parts of the risers of a block, to make a depression there that is the same diameter of the foot under her jack. Once the foot is lowered down in there, it's pretty much locked in place.

