Just got my new (for me) 1100 and in cleaning it up, I've become somewhat confused regarding the piston/piston seal. According to my quick research, it seems that some 1100's come with separate piston and piston seal, and some (newer?) 1100's have a combined piston/piston seal unit...is that right? The manual shows separate components, but I've seen reference to a "unit" setup in various parts lists and on some how-to web sites. Please help, as the pheasants are waiting...