I've got my old 3 Stihl snippers running now ,2 I had to put Victa modules on and one the carby wouldn't pump fuel up from the tank so I just changed the carby and runs well now but I haven't connected a throttle or air cleaner yet.
I didn't have to make anything up to bolt the carby on, just used a carby mount from an old trimmer and I think it's a old mcculloch line trimmer carby.
Occasionally when I buy a part cheap from China it doesn't work but usually I can take parts out of the new item and use them to rebuild the old item and I have a working item again , it's interesting to see the faults with the new items sometimes as they are clearly non working factory seconds that should have ended up in the bin.