I have a 12guage 870 Remington special field vent rib fixed modified choke.A few years back I needed a skeet gun an had it drilled out,after he drilled it there was holes in the pattern I had it looked at by another smith an he said that it had been drilled out to almost a open choke.can this be fixed? dose anyone know a smith that I could send it to that would fix it.I dont know of any good gun smiths in my area.