where would I put it?
Sometimes the obvious answer is the hardest to see
I am not a handy man
First get a friend to help, together you can both figure it out. Then you'll need three long strips of wood or plastic or fiberboard. 1 to 3 meters long but all equal in length, also two smaller pieces of wood for the ends to join the other pieces, have them cut in a shape of a trapezoid
Attach your pieces to the bottom and sides of the trap. Tape the inside seems to prevent seeping. Now you have a mold
this is the easiest less technical way of building one but it will be great to skate. I'll go into it further if you're interested
You can get real creative with it
Or real technical
Sorry for hijacking here's my curb