hm from my current tests this is already working. for example if you use the fturret as a "pod" on a research station you can "research" it on every station. if you want the same station to have more then one fturret you will have to copy the odf (fturret_1, fturret_2, etc..).
not quite what I meant, I'll run through a scenario...
I make a mod that allows a small stationto be built that can build 4 turrets on it (a super turret station) these are rturrpod1.odf, rturrpod2.odf, rturrpod3.odf, rturrpod4.odf. during a game I build the station with all the pods. I then build another of these stations but it wont let me build the turrets again.