Recirculating traveler control line

[allene]

My end boom rigged main sheet goes to a traveler on the afterdeck. The 5:1 main sheet goes to a horn cleat or turning block cam cleat depending on our mood (another story). The main trimmer is having trouble with the traveler control line snagging on the traveler control blocks and I ran across an article by Brion (http://www.harken.com/traveler/TravelerTuning.php) talking about using a recirculating control line. That seems like just what I need! Brian talks about not making it too long so you don't trip but is there any rule of thrum on how long is too long or how short is too short? I know we can just try it but as the only time we try anything is when we race I would prefer to have a good starting point. Just to be sure I have the concept correct, one continuous line is tied off on each end of the traveler and threads through all the blocks going through the two cam cleats with a loop not long enough to trip on.