Jerry, I did it myself, not once but twice
A couple of years ago I removed the outhaul and the reefing line (don't ask me why... I forgot anyway!!) during spring commissioning without pulling messenger lines through the boom. I guess I had an idea which I thought would improve single-handing capability... Anyway I lost both lines and had to remessenger them.I took a piece of small stuff (nylon cord), tied a sinker to it and lead it through the correct sheave at the foreward end of the boom. The sinker has to be small enough to pass over the sheaves at the foreward and aft ends of the boom. I took a fairly heavy sinker and flattened it with a hammer. I had to disconnect the gooseneck and lower the aft end of the boom to get the sinker to slide down. Once it reached the sheaves at the rear, I used a piece of light wire bent to hook the line and pulled the line onto the correct sheave. The small stuff became the messenger for rerouting the line to its original location. Repeated the same procedure for the other line and had them back where they were originally. Of course you will have to sew or tape the reefing line to the messenger. If you use tape, go easy with it or it won't pass over the sheaves and you could lose your messenger.You will have to remove the mainsail in order to disconnect the gooseneck and lower the boom to work on it, but it can be easily done right on board. If your 272 boom is made by Z-Spar like mine, there should be no problem reaching through the aft end of the boom to hook the messenger.Happy Fishing!!Tom