I recently purchase an MX8 trap combo with 4th gen choke tubes(18.4). Previous owner could not find any of the extra tubes. It came with 3 flush chokes 0,4,4 . This is the first P gun that I have owned with factory choke tubes. If you are in my shoes do you try to locate more factory flush tubes or buy some aftermarket chokes like Briley ???? Any opinions will be greatly appreciated.