Larry, filing the tube however I am concerned that the choke tube is too thin to have any effect.
FAIR will not stand behind their poor quality control. There are several members here and in the 16g. society purchasing or considering a purchase for the FAIR Iside. I wish them well.
A choke tube that is too thin would indeed be a big problem. You would need to file a lot, so it won't work for you if you don't have enough metal. The cheap flush mount Carlson chokes that I have tried had enough metal to make a significant difference, but I don't know if they make one to fit your gun.
Filing the choke, or rather the choke tube, is a last resort type thing to try to make an otherwise useless gun at least somewhat usable. But maybe it's usable as is; just shoot only right to left targets with the left barrel and you will have a built in lead.
