Control-line hdwe. for smaller models

No control horn should be used without a plywood pad under it and on top of it. Using CA to harden the area isn't a good solution either. Cut a small square or circle of 1/64" ply and glue it onto the elevator surface and then drill for the horn. It spreads the load and prevents the horn from pulling through the elevator. One would think it's only a 1/2A but a mishap like a ground doink or flip over landing can really over stress the horn and rip it through the elevator. Using the small horn makes this even easier due to having little to no footprint. The single screw is misleading and one can easily over do the tension required squashing the wood which totally compromises the connection.

            The main problem with the small horn is it's size, unless your using a larger bellcrank, it really is making the controls too fast. This can be compensated somewhat on the handle end. The single hole though is responsible for several crashes that I've witnessed. Instead of moving the elevator surfaces, I've seen the entire horn rotate until it jams the pushrod locking up the controls. I highly recommend roughing up the nylon, clean it with acetone and put a dab of epoxy onto it prior to installation to hold it firmly in place and prevent it from turning.

         One other tip I would like to offer is that prior to installing nylon horns is to wear a glove and run the screws through the horn first. The screws totally suck and if the improper driver is used, the screwdriver slips. This not only can go through your hand, it will go through the elevator. On the Dubro horns and others for larger than 1/2A, I disregard the wood screws and I use 2-56 socket heads. The look cleaner and they install much easier.  I cut the balance off with a Dremel disc taking little bites at a time so that it doesn't overheat it melting the nylon.