I do really like the way the gun moves and don’t want to upset that. But it would obviously be nice to be able to change the chokes if needed. Although I am shooting it good at the minute.Choke was always a measurement taken as tighter than the actual bore of the gun. Measured in thousands of an inch or roughly .25 of a millimeter per quarter choke. So every ten though is an extra 1/4 choke five thou the in between chokes Skeet 3/8” so on. Bit annoying when in today’s world 40thou is extra full and full would have been 7/8” a few years ago. That’s using measurements if by pattern percentage in s circle cart choice can make a decent difference. So pattern your gun as it is with a choice of carts to see what it’s actually putting out regardless of what it measures at the choke. Fixed choke is less hassle and normally better balanced.