First off...how is Amdhunters post before the OP?
Secondly, i'm not using my penis to beat the thing into submission...they've got spines on their backs.
Thirdly, the ones at tackle shops are pretty expensive...figured an aluminum tball bat would be better.
Fourth, i have a tape measure on the side of my yak so when I get it to the boat i'll base my initial measurement on that...if it's bigger then i'll beat the crap out of it while it's still in the water. That thing is not coming into my boat while it's still alive. Cobia can do some amazing damage when the come out of the water, especially a 30-50lber.
Pipe doesn't sound like a bad idea, just gotta figure out a way to give it a little more weight in order to get some extra oomf out of it.