I just bought a lightly used MX8 (Type IV) 18.4mm bore that came with 0, 2, 4, 6, 8, and 10 factory choke tubes. I plan to use the shotgun for casual skeet, sporting clays and trap. So, I want to add a pair of 1s or SK chokes, and another 2 or IC. Standard internal chokes are fine, but I’m also thinking of a set of external chokes primarily for sporting clays. I’d appreciate any help in locating,or purchasing some additional choke tubes. Thanks, Ed