DRAGONFLY Trimarans User Forum

I had a question concerning the exit blocks in the mast for the reef lines. My boat just has a gaping hole there with four small holes around the perimeter just above the boom. I assume there was an exit block, or blocks here for the reef lines, that was riveted in. I was wondering if there was a specific brand, and model that would fit right in the hole, and line up with the rivet holes as well. I have tried a few exit blocks, that didn't fit, and it would be helpful if I knew what did. Also, do these blocks go side by side, or over and under?

Thanks,
Dan