Well now, I was On Call today. Didn't have to work. So I worked on the trailer today. I painted the under side where I just installed the from and back cross members and luan plywood this last Sunday. Added a coat of high gloss white to the storage boxes. Added another coat of paint to the outside of the boxes underneath. Then I made two spring loaded PVC Stabilizers for the back of the trailer to prevent it from tipping over. Very little weight will be behind the wheels, however the possibility of tipping over is still there. so I build this stabilizers out of schedule 40 2" PVC. They are light weight, only 1 pound each, easy to build, inexpensive, and easy to use. I didn't have a lot of room under the trailer, and It's quite low, so getting down under it to lower more conventional stabilizers would be a pain in the butt! These will come out the back behind the wheels near the side and will be easy to reach. They are spring loaded, so they self retract when the pin is removed, and will stay up out of the way. I don't expect much weight in the back. They seem quite strong. Guess we'll see!!
Here's how I built them....Tipped the trailer on end to paint/seal the bottom and work on the stabilizers.

Here's the area I'm sealing and working on. Hard to get in there to seal!!

assemble the parts. 2 12" PVC pipes. the small one fits inside the larger one. 15" spring, PVC end cap, clevis pin. I ended up using a hitch pin instead.

Cut the spring in half and bend the spring up to create a new hook on the cut end.

This shows the pin that will hold the spring inside the tubes. One at the top of the larger tube, and one midway into the smaller tube.

Here's the inside of the smaller tube inserting the spring.

I'm attaching the spring to the pin inside the larger tube

The end cap is screwed in place so it can be removed. The whole thing can be taken apart to repair springs etc.

Here's the stabilizer installed. Not painted/sealed yet. In this picture, the stabilizer is retracted.

Here it is extended. I'm going to replace the pin with a larger one. They were out of the 3/4" pins today!

The stabilizer is held in place with this hose clamp. Loosen the clamp to remove the tube for repairs or whatever.

I've sealed the supports for the stabilizers and glued them into place. When they're dry I'll install the stabilizers and test them.

I'll post pictures of the stabilizers up and down when they're installed next weekend.