I believe there are two versions - the original and the current production. Not sure what the differences are, but I recall seeing where parts are not interchangeable. If you have a new one and can get the exploded views, compare the 880's trigger to the 953. If it is the same, then the Pilkington modification for the 953 might work. Haven't heard if this is possible nor seen posts of doing it. Might ask on the Yellow.