Guys....I just bought 2 new pickup tubes for my B&S Pulsa Jet Carburetor that goes on the 1976 5 hp flathead. I know that the short one just screws into the carburetor, but the longer one somehow fits over the metal tube and then uses a new ring? clamp? to hold it in place. I just tried slipping the longer tube onto the metal tube and it is a dang tight fit!!! How am I supposed to install this thing!? Also, how would I install the clip/ring to hold it in place? Is there a trick to this cause it aint budging...