Well i finished sanding the mold and got the chance to pull two different ones today and they turned out awesome imo!!! The insulation foam would be cheap but it collapses under the force of the vaccum...even simple plywood molds collapse if not properly braced...i pulled two molds in two different colors...let me know which one you guys like better...i think im opting towards the tan...
This is a picture of the mold after it was completed...as you can see its a really simple and undetailed
This is the black and tan (i sure could use one!!) pieces i pulled...they are just rough cut right now so they dont look too pretty around the edges...i left extra on it so i could cut it to fit...im going to cut it to fit a stump i have so the water feature looks as if its coming out from under the stump...various rocks and slate will be siliconed to them as well to give a more natural shape...comments/suggestions appreciated as always...