My suggestion is to shoot it 'as is' for your sporting use and switch from #9's for the inside 30 yds or so targets to #7.5's for everything else, inclusive of all 'rabbits'. Or you could simply shoot all #7.5's. You may be very pleasantly surprised at your scores. Spend money on getting the stock bent, if needed, and the trigger(s) done and the muzzle or keels touched up if they are rough or the gun on face. Believe it or not, you don't NEED a lot of choke even for 40 yard tower birds w/7.5 shot, the clays break much easier than trying to bag a live bird at the same distance.
The newest Fiocchi 'target shooting dynamics' 1oz loads of #7.5 shot @ 1200fps [12SD1H75]is very pleasant to shoot & has patterned well in several of my guns when I've bothered to shoot a few on the plate. Suggest you buy a flat & don't even bother to pattern your cut Fox until you've shot the first nine boxes at clays. I'd just about bet that you might not even be inclined to even bother by then.
kind regards, tw
