The ECO pump was actually an 8mm plunger and so simply swapping the top will not make it a TD pump which came with a 9mm plunger. A TD pump onto a n/a pump should work. I haven't run one that way yet, but have heard of others doing it and can't see any reason it wouldn't work.Andrew
yeah the na pumps are actually better than the eco pumps... seems like most people don't know that though