I just picked up some 30 pilots and at a quick glance the look the same as my 25's but when I look closely they are different. The nozzle end (the part with the holes drilled in the sides) is bigger on the 25's. Does this matter or was I given the wrong type of jet? All the other dimensions are the same. They all have the same square stamped on in front of the number. The 25 has a line around it too and the 30's don't.