nice job Ksor 
Just one thing you will need a bead around the inside of the moulding flasks to stop the sand moving 
Do you have a project in mined that needs castings ?
Rob
No, I have no projects in mind right now - of cause I have to melt all my scrap into bars - but nothing else ... don't tell anybody... I have 12-14 projects going right now ... I have to finish some of them first

Yes, maybe you'r right about the bead on the inside ... it can be glued on now I think.
>> Fergus:
I got some green sand from a molding company in a nearby city - they scrap 10-20 tons of sand every day - so I got 25kg ready mix and 25kg to make some new sand with extra clay and coul.
I think this method best fits my way of "mold-thinking" - I think it looks as a "safe path" ... other methods looks more random to me .