We inserted the tubular, spring steel landing gear legs through a pair of holes we cut with a hole saw in the fuselage. We used the aftmost pair of sockets that are in the CrMo tubular cage frame since we were building the tricycle gear version of a Sportsman. We clamped the gear legs to a long piece of aluminum placed on the floor crosswise to the fuselage. Then we used special cobalt bits with plenty of Boelube and a 1/2" chuck SnapOn air drill which turned rather slowly to drill holes through each the gear leg socket and gear leg. A tight-fitting bolt inserted into the hole locked the leg in place.