Here you can see the components for the horizontal trim fin winglets. To the right of the picture are the two halves of the winglets and you can see the fiberglass doubler along the left edge used to strengthen the joint.

On the left side of the picture you can see the two winglets halves held together by cleco fasteners.

This was my first ever fiberglass work. I had my pants stuck to my leg, my sleeve stuck to my arm and little fibers stuck to everything before it was all over. There's a knack to working with fiberglass. Proper preparation of the work area can go a long way in making this easier.

Here are the aluminum trim fins as supplied from RotorWay and the winglets that have to be joined together. In the foreground you can see the wood plug that was crafted as an insert to join the two pieces together.

The wood insert is crafted from square stock. Then the joint is made with epoxy glue and countersunk wood screws.

At the rear of the picture you can see how the parts mate together.

After the joint is made, you finish it with a layer of fiberglass and then bondo. There's lots of sanding in this process. The bondo begins to set in about 5 minutes so you have to know what you want to do and do it quickly. It took me several tries to get it right. Did I mention there's lots of sanding.

This whole process of joining the winglet halves, joining the trim fins to the winglets and finishing the joint is a bigger chore than I first anticipated. This whole process took about 12 hours of work. I could do it now in half the time. Ya live and learn!

Here's the horizontal trim fin assembly mounted to the tail boom.

The next step is to mount the vertical stabilizer and then assemble and mount the tail rotor assembly.