old one is 3' by 3' the mifco is 3' by 6' (rough dimensions) , sand goes from mold bench to mold to pour to break down box to muller to mold bench always in the circle none is sitting idle. All my sand is used and I am using oil bond sand that should be kept in a closed metal container. a rough guess on how much sand is about 400 pounds. As for as liking the bigger is better! the small one needs a table next to it to hold the other 1/2 of mold, plus it is taller. how big of molds do you want to make my big flask is 12 by 18. Btw I use a small coal shovel to fill my molds, a good amount for the hand riddle. the rest of the sand gets moved by a foundry shovel see #12 on pic.
oldgoaly, proud to be a member of MetalworkingFun Forum since Jun 2013.