Actually, I 'studded' mine! Took awhile to find a place where I could buy the heli's, drove down there, got all the installation tools required as well. Got some 'all thread', stainless steel, pulled up a chair and stuggled to get them dam helis in there straight. 10 minutes my a$$
, and a WHOLE pack of cigarettes. Put nuts on the end of the 'studs', of course that leaked. Figured out how to make a gasket for the studs (did I mention 10 minutes my a$$?)... Finally got the suckers back together and NEVER could get them to run right (power valves, jet changes, you name it). It was shortly after than I threw in the towel and bought some new ones.