I have a 2 part question regarding this shotgun.1) I am considering buying a Charles Daly "Sportingclays" Superior Grade 12ga 28in barrels. as a combo skeet / clays gun for my son. It is a used piece which appears tight and no signs of wear what-so-ever. Lever is still right of center it is of post 1990 vintage. I have had the opinion in the past Daly's where a fairly good gun but many of the posting here lately are slamming the new ones. Any advice or comments are appreciated.2) Are the choke tubes proprietary for Dalys or will something else work. Can't find a cross reference for them. Any guidance here?