My idea for a rear stabilizer.
Weld a piece of square tubing 2"x2" on the inside of the rear bumper. Drill a hole in the square tubing to fit a 1/2" black gas pipe. Drill another hole 3/8" on the side and weld a 3/8"nut to the tubing. Screw a 3/8" bolt into the 3/8"nut.(use this as a set screw for the 1/2" black gas pipe) Base is wood 2x6 with a 1/2" hole in the center and 1/2" deep.
To operate--> Level your trailer first.
Now lower your tongue jack 2 full turns.
Next slide the 1/2" pipe into the top part of the bracket, and push down to the ground where your 2x6 is, line up the 1/2" hole in the wood base with the black pipe.
Now tighten your set screw.(to keep pipe from moving)
Last thing raise tongue jack 2 full turns.