The 255 RB-3 ( I have one) has a large bobbin and is self oiling, but is otherwise pretty much just like the 226R. Don't know how the guy could have looked at the machine without blowing out all that crap. "Air intakes"? No such thing on a sewing machine. A sewing machine is never starved for air like an engine could be. That would be like a fishing reel being starved for air.
No one lives forever, the trick is creating something that will.