The next step was to install the redesigned sponson transoms. This turned into a two step process. The first step was to get the locations of the glue blocks required to support the front end of the nontrip panels. Knowing the nontrips are set at a 45 degree angle, it was a matter of computing the location of the bottom end of the block. This worked out to 3/32" above the bottom of the boat due to the thickness of the nontrip panels. After the glue blocks were installed, the sponson transoms were attached with epoxy. The catch here is to make sure the transoms, especially the right one, is at 90 degrees to the sponson inside. To those that have never built a sport or scale hydroplane, this is one of the most critical parts of building the boat. Since the skid fin is mounted on the right sponson transom face, any deviation from square will affect handling or must be compensated for when setting up the boat later. It's better to get it right from the beginning and not have to worry later.
With the framing all installed, the outside top corner of the cross frames were notched and a 1/4X1/8" spruce glue rail was installed to the top of the glue blocks with the wide face out. It's important that the rail be high enough to extend above the finished height of the nontrip panel as this will be the surface the deck is epoxied to later. At this point, the nontrip panels were installed with epoxy and left to cure. In the second picture, the air trap and the extension are clearly visible at the base of the nontrip.