I don't have a duplicator and unless I start turning chess sets where you want each piece to be identical I don't think I'll ever get one . Rather then "Churning out" $10 slimlines by machine , I "Handcraft" each pen and can get $25 to $75 for a "Handmade" slimline , not that I make many slimlines anymore anyway . The biggest selling point about my pens is that each one is handmade and unique .
After several years now I can turn a slimline as fast as someone with a duplicator . Turning a pen is the fastest part of making it , getting a perfect finish can take much , much longer then turning it .
In my humble opinion , you would be far better off spending your money on a collet chuck or a scroll chuck or even better quality turning tools and concentrate on making better quality pens . Improve your finish , make better quality kits or even go past the kits and make your own unique pens . Again this is just my opinion and you know what they say about those .....