I might add that having YOUR stock duplicated is a big plus if you are a stockmaker. The grip sweep, top tang angle, floor plate angle is all critical and a generic run stock, especially on a double gun is very important to be correct. Otherwise they must leave so much wood it's a pain to work with it in order to get your stock correct or leave you enough wood with which to work.
Prior to buying a duplicator I've done the last 4 years worth of stock making from a blank, not pre cut but a blank. I stock about 20=30 guns a year. I'm in hog-heaven now with my own machine, Jerry
Pictured is my last one done from a blank and not run on the duplicator, Eagle grade L.C. smith