Dan, yes, the (.STL) files sent to the 3D printer had scaled up measurements by, if I remember correctly, 2.5 %. Still, the parts turned out a bit on the small side.
Glenn, in a few years I'll probably still be building on this model
Neil, thanks for the links, they'll help me, too. Would you be able to say whether the described shrinkage cavities problem is normal by this size/shape of parts using lost wax casting? Material was brass CuZn34Al2. I've been considering going to another foundry for some other, still bigger parts.
Stefan