Centerboard trunk/leak fix

Hi,
I've downloaded the technical note from DJ Bents regarding the use of the threaded brass fitting as a fix for the centerboard trunk/bilge/cabin problem.
Seems to make sense. Anybody tried it? Is it as simple as the notes suggest? One thing missing from the notes is the length of the fittings. I've browsed some hardware suppliers, and can only guess at the length until I tear into it. Is it 2", 3" 4"? I have no idea--all he mentions is 1/2" diameter. I have not found any pipe fittings longer (and threaded continuously) than about 2". Is getting something custom threaded the only solution?
Thanks.
Leif
I've downloaded the technical note from DJ Bents regarding the use of the threaded brass fitting as a fix for the centerboard trunk/bilge/cabin problem.
Seems to make sense. Anybody tried it? Is it as simple as the notes suggest? One thing missing from the notes is the length of the fittings. I've browsed some hardware suppliers, and can only guess at the length until I tear into it. Is it 2", 3" 4"? I have no idea--all he mentions is 1/2" diameter. I have not found any pipe fittings longer (and threaded continuously) than about 2". Is getting something custom threaded the only solution?
Thanks.
Leif