Hi, just wanted to share with you my way of building containers for resin water on bases.
You’ll need sharp knife and transparent hard plastic, I used foil for making stencils – it’s thin and stiff. Enough durable to stand against resin pressure.
I cut walls for my container (remember that wall endings must be 90° degree to make it work well. So be carefull and cut precisely. Toothpick is great to apply maskol to walls, endings was glues outside using cyanoacrylic glue.