I have added a 2" thick walnut base under the 1/4" one
earlier.Here are a couple of tips;
1) when you wet the sand and glue mix the 1/4" plywood will warp, and become concave around the log that I screwed it to. That is the reason I advanced to attaching to walnut base. I glued it using a commercial calk type glue and clamped it in place to set. So much stress on the board that it pulled up some, then I used a large head metal scrrew, screwed it through the sand into the walnut. This worked well. Simple; covered the screw with a ridge of sand and proceeded to water application.
2) I wanted a little movement in the water so I tried to make a slight ripple. It worked pretty good, but I need to work on the technique some. In the past I have used hot melt glue to make the ripple then poured the resin over it to hide the glue look. Problem is the glue is somewhat cloudy and really shows up through to glass clear resin. I think I will add some more water on one end and a little to the back to finish it out.
Now on to carving the 6" Skink lizard and the yellow lady slippers.
To be continued.