[Blake]

Hi Andrew
We are printing the positive not the negative (mold) and finding that the PLA does not burn out that well and are looking for other materials. I'll let you know how it works out!

We are not working with the printed sand as these are the same as molds and you need to open them up in order to empty out the sand that is not bound (glued) so it needs to be a two or more part mold.

Hope that this makes sense.

You have to print the positive and then cast that in order to get away from making a mold.

Yes I have jumped in and I am finding that it is not that easy to get a good cast on a large piece... but it will get better.

Cheers Blake